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Nasrul Ilminnafik
Jurusan Teknik Mesin Fakultas Teknik Universitas Jember
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Analysis of Avgas Fuel Spraying Schemes Using the ANSYS Application Approach Putra, Dimas Endrawan; Ilminnafik, Nasrul; Hentihu, M Fahrur Rozy; Kustanto, Muh. Nurkoyim; Yudistiro, Danang; Syuhri, Skriptyan N.H.
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 1 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v8i12024p071

Abstract

Avgas fuel consumption on Cessna trainer aircraft is very high. However, there has been little research regarding spray impacts in Cessna aircraft engines. The phenomenon of avgas spray colliding with the cylinder wall may occur during fuel injection, resulting in a changed spray radius and height, which will affect the mixing of fuel and air. In several aspects, this affects engine performance and exhaust emissions on Cessna aircraft. This research aims to determine and study the phenomenon of spray impact on avgas-fueled aircraft engines. The fuel spray in the study occurred in the combustion chamber using pressure from a fuel hand pump whose pressure was supplied from a compressor with a pressure adjusted to the original pressure on the aircraft, namely 2 Bar (30 Psi). The experiments in this research used a high-speed camera system to study the phenomenon of avgas spray on walls to get better spray distribution. The results of this research were processed using the CFD application. The result of this research is that the greater the pressure, the more concentrated the resulting jet will be on the jet wall so that the atomization of the fuel jet will be dispersed. When the burst occurs, a change of 3.80e+00 occurs compared to other burst pressures.
Kecepatan Pembakaran Laminar dan Tinggi Api Premix pada Campuran Pertamax-Avgas dengan Etanol Nur Cahyo Hidayat Nasrullah, Muhammad; Nurkoyim Kustanto, Muh; Darsin, Mahros; Ilminnafik, Nasrul; Noor Hidayatullah Syuhri, Skriptyan
National Multidisciplinary Sciences Vol. 3 No. 1 (2024): PROCEEDING SEMAKIN E.1
Publisher : Universitas Muhammadiyah Jember

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Abstract

Bahan bakar penerbangan yang umum digunakan untuk pesawat dengan tipe mesin reciprocating adalah avgas 100 LL. Keandalan penggunaan bahan bakar ini masih belum tergantikan, khususnya di daerah Indonesia. Pada umumnya avgas menggunakan zat aditif berbahaya berupa tetraethyl lead atau timbal untuk meningkatkan performa bahan bakar ini. Meskipun dapat meningkatkan performa, zat aditif ini terkenal menjadi cancer agent hingga penyebab penurunan IQ akademik pada anak-anak. Beberapa penelitian untuk mengurangi penggunaan timbal pada bahan bakar penerbangan sudah beberapa kali dibahas oleh para peneliti, salah satunya dengan mencampurkan avgas dengan bahan bakar konvensional tanpa timbal. Namun jarang yang membahas mengenai kecepatan pembakaran laminar (SL) pada topik tersebut. Artikel ini bertujuan untuk mengetahui dampak pencampuran bahan bakar avgas dengan pertamax serta penambahan etanol, serta variasi nosel burner terhadap kecepatan pembakaran laminar (SL) dan tinggi api premix yang dihasilkan pada rasio ekuivalen 0,8; 1,0; dan 1,2. Metode bunsen burner dipilih sebagai alat pengujian, karena dinilai simpel dan memiliki hasil yang cukup akurat. Dari pengujian yang dilakukan etanol memiliki nilai S­L tertinggi. Campuran avgas dan pertamax memiliki kecepatan pembakaran yang lebih rendah dibanding avgas 100 LL murni, namun lebih tinggi dari pada pertamax murni. Sebaliknya hasil tinggi api berbanding terbalik. Namun dapat diketahui bahwa penambahan volume 30% etanol pada campuran terbukti meningkatkan kecepatan pembakaran yang dihasilkan. Selain data dari variasi bahan bakar, pengujian juga dilakukan dengan variasi diameter nosel. Dapat diketahui bahwa diameter nosel mempengaruhi nilai SL.
Optimalisasi Kinerja Motor Bakar Empat Langkah Berbahan Bakar Bensin dan Penambahan Water Elektrolisis dengan Katalis KOH Aliyansyah, Berly; Ilminnafik, Nasrul; Syuhri, Ahmad
Simetris: Jurnal Teknik Mesin, Elektro dan Ilmu Komputer Vol 15, No 1 (2024): JURNAL SIMETRIS VOLUME 15 NO 1 TAHUN 2024
Publisher : Fakultas Teknik Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/simet.v15i1.10609

Abstract

Indonesia adalah negara dengan penduduk terbanyak didunia. Peningkatan jumlah penduduk juga berdampak dengan bertambahnya kendaraan dan polusi udara.tinginya polusi udara karena kurang sempurnanya pembakaran pada ruang bakar, penambahan elektrolisis air dapat menurunkan emisi gas buang serta dapat menambah kinerja pada motor bakar. Untuk menambah produksi elektrolisis pada penelitian kali ini membandingkan pada kondisi standar dan konsentrasi KOH 3%,6%, 9%. Hasil dari penelitian kali ini mendapatkan kenaikan torsi 2.8% dari standar pada konsentrasi 9%, daya naik 2,2% pada konsentrasi 9%, konsumsi bahan bakar spesifik turun 28.64 % dan emisi gas buang kadar HC turun 94.66 % serta kadar CO turun 97.37%
TINJAUAN INTENSITAS RADIASI MATAHARI: IMPLIKASI POTENSIAL UNTUK PENGEMBANGAN ENERGI SURYA Ilminnafik, Nasrul
MEKANIKA : Jurnal Teknik Mesin Vol 10 No 2 (2024): December
Publisher : Program Studi Teknik Mesin, Universitas 17 Agustus 1945 Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30996/jm.v10i2.10791

Abstract

Radiasi matahari merupakan faktor kunci dalam sistem iklim karena mempengaruhi semua fenomena cuaca dan iklim melalui variasi distribusi sinar matahari. Dampak matahari tidak hanya berdampak pada iklim dan cuaca, tetapi juga mempengaruhi sektor-sektor seperti pertanian, sumber daya air, dan energi. Jakarta, yang terletak di wilayah khatulistiwa, mendapat manfaat dari sinar matahari yang melimpah sepanjang bulan, sehingga sangat cocok untuk memanfaatkan energi matahari. Namun, penting untuk memantau intensitas radiasi matahari untuk mengetahui sejauh mana potensinya. Penelitian menggunakan kuantitatif dengan pendekatan pengamatan intensitas radiasi matahari di Jakarta selama 4 bulan. Lokasi Pengamatan akan dilakukan di stasiun pengamatan intensitas radiasi matahari di GI Kemayoran, kawasan Sunter Agung, Jakarta Utara atau di tempat (AESI) Asosiasi Energi Surya. Berdasarkan penelitian yang dilakukan, dapat disimpulkan bahwa pada bulan Juli hingga Oktober terdapat tingkat intensitas radiasi matahari yang tinggi rerata secara berurutan yakni 334,29 W/m2, 374,13 W/m2, 414,33 W/m2, 402,16 W/m2. Oleh karena itu, pemanfaatan energi surya dalam sangat cocok bagi masyarakat Jakarta untuk meningkatkan kesadaran dan transisi menuju energi terbarukan.
Optimization of the Number of Cylinder Blades in Coffee Pulper Machine: Finite Element Analysis and Simple Additive Weighting Methods Syahriza, Mochamad Rifki; Djumhariyanto, Dwi; Ilminnafik, Nasrul; Darsin, Mahros; Yudistiro, Danang; Basuki, Hari Arbiantara; Wibowo, Robertoes Koekoeh Koentjoro; Syuhri, Ahmad; Sumarji, Sumarji
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 8, No 2 (2024)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v8i22024p476

Abstract

The increasing interest in coffee in all circles means that coffee production and quality must always increase due to consumer demands. One way to maintain the quality of coffee beans is by breaking them down using a huller machine. This research aims to improve the optimization of coffee machines by modifying the cylinder blades of huller machines with variations of 3, 4, 5, and 7 cylinder blades in terms of static loading design and quality and production capacity of coffee bean breaking. The experiment was carried out using 400 rpm and breaking 10kg of dry coffee cherries every time the sample was taken. The research results show that the best sample collection is the variation of 3 cylindrical blades with the maximum stress and lowest deformation values of 6.67 MPa and 0.000737 mm. In terms of production quality, it shows that the best sampling was the three cylindrical blade variations with 50% whole and good coffee beans. In terms of production capacity, the most significant capacity was the seven cylindrical blade variations with a value of 294.11 kg/hour. Sampling from the four most optimal variations uses the SAW (Sample Additive Weighting) method. The most optimal result from the 4 test criteria, the variation of 3 cylindrical blades is the best because it has the highest score with a value of 0.9754.
Effect of Biodiesel B100 and Ethanol Blends on the Performance of Small Diesel Engine Firdiansyah, Alfian; Ilminnafik, Nasrul; Triono, Agus; Kustanto, Muh Nurkoyim
International Journal of Mechanical Engineering Technologies and Applications Vol. 2 No. 2 (2021)
Publisher : Mechanical Engineering Department, Engineering Faculty, Brawijaya University

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21776/MECHTA.2021.002.02.3

Abstract

A small diesel engine is a machine that has high efficiency but causes a high level of pollution. The most widely used fuel so far is fossil energy which is unrenewable energy. The fruit of the Calophyllum inophyllum plant has great potential to be developed as alternative energy for small diesel engines. In this study, the test fuel used was D100, B100, E5, E10, and E15. The small engine diesel used TG-R180 Diesel with a compression ratio of 20:1 at engine turns 1500, 1800, 2100, and 2400 rpm, and the braking load at a constant prony disc brake is 1,5 kg/cm2. The result of the study using E10 fuel can improve engine performance and can reduce the opacity of the exhaust gas. The highest power in the D100 fuel at 2100 rpm is 8,06 PS. The highest thermal efficiency of E10 fuel is 50,29%. The use of Calophyllum inophyllum biodiesel (B100) can reduce exhaust gas opacity in small diesel engines when compared to the use of D100. E10 fuel has the lowest exhaust gas opacity rate of 4,1%.
Performance of a Single Cylinder Diesel Engine Fueled by 40% Biodiesel Blend with Excess Air System Firdausah, Risco Eka; Ilminnafik, Nasrul; Asrofi, Mochamad
Journal of Mechanical Engineering, Science, and Innovation Vol 5, No 1 (2025): (April)
Publisher : Mechanical Engineering Department - Institut Teknologi Adhi Tama Surabaya

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31284/j.jmesi.2025.v5i1.6917

Abstract

In recent years, advances in science and technology have changed human lifestyles and increased global energy consumption. The global innovative search for alternative fuels from renewable sources such as biomass has become important, such as biodiesel. The use of biodiesel in diesel engines requires changes in air supply. Proper air supply is needed to obtain optimal engine performance. The purpose of this study was to determine the effect of using an excess air system on engine performance and exhaust emissions in diesel engines with a mixture of dexlite and biodiesel fuels. The research method used is experimental research and the parameters in this study include the use of an excess air system of 10 L / m, 20 L / m and a load of 300, 400, 500 Watt with biodiesel fuel (B40). The results of this study with the presence of an excess air system can increase combustion efficiency, thus increasing engine engine powerand torque with the most efficient engine power and torque, namely 4.87 KW at a load of 500 watts and 3.101 Nm at a load of 500 watts with excess air of 20 L/m. Fuel consumption also decreases with the presence of an excess air system at 10 L/m load 300 with a value of 0.16 kg/hour. The excess air system can also reduce CO and HC exhaust emissions with excess air of 20 L/m and a load of 300 watts, namely a CO value of 0.02%, an HC value of 18.2 ppm. So the use of excess air is effective in improving engine performance and emissions.
Karakteristik Semburan Bahan Bakar Aviation Gasoline dengan Nozzle Pesawat Cessna 172S Ilminnafik, Nasrul; Dimas Endrawan, Putra; M Fahrur Rozy, Hentihu; Muh. Nurkoyim, Kustanto; Danang, Yudistiro
Journal of Mechanical Engineering Vol. 1 No. 1 (2024): January
Publisher : Indonesian Journal Publisher

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.47134/jme.v1i1.2182

Abstract

Avgas fuel is fuel from aviation engines, namely piston engine type aircraft, where the spray of this fuel is very influential on the life of a piston type aircraft engine. The characteristics of avgas fuel bursts, namely the distance, temperature and shape of the spray, are rarely studied in Indonesia, so with using experimental and varied data collection techniques, we obtained the characteristic results of the avgas type fuel spray and its mixture, where the mixture of 20% ethanol with a distance of 21 cm at a pressure of 3 bar is the lowest point of the fuel mixture spray temperature, namely reaching 15oC, the effect of The mixture of fuel with ethanol means spots on the walls and combustion chamber due to the mixture of alcohol containing water so that traces and water spots can become crust on the combustion chamber.
Performance Analysis of Alkaline Fuel Cell with Variation of Potassium Hydroxide Concentration in Electrolyte Solution Alfariz, Mohammad Rifqy; Ilminnafik, Nasrul; Djumhariyanto, Dwi; Hardiatama, Intan; Ibnu, Muhammad Khadafi; Nugraha, Raafi Aditya; Freitas, Domingos de Sousa
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 9, No 1 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v9i12025p103

Abstract

Alkaline Fuel Cell (AFC) is a green energy conversion tool that converts chemical energy into electrical energy through electrochemical reactions. This research aims to analyze the effect of potassium hydroxide (KOH) concentration variation in electrolyte solution on the AFC performance, using nickel and manganese catalysts. The research methods include experiments using various KOH concentrations to determine the optimal concentration to produce the best AFC performance. The voltage and current produced are measured, as well as the calculation of the electrical power and efficiency of the AFC. The results showed that KOH concentration has a significant influence on the performance of AFC. It was found that the optimal KOH concentration produces maximum electrical power and energy conversion efficiency. The highest alkaline fuel cell performance was found at 70% KOH concentration. In addition, the use of nickel and manganese catalysts was shown to improve the stability and efficiency of AFC. The result makes an important contribution to the development of AFC technology, supporting global efforts towards cleaner and more sustainable energy use. The findings also provide a basis for further innovations in AFC design and materials, as well as their potential in practical applications such as electric vehicles and portable power plants
Boiling Heat Transfer Coefficient and Critical Heat Flux on Conical Cylindrical Copper under Surface Modification Nashrullah, Muhammad Dimyati; Sanata, Andi; Solahuddin, Imam; Ilminnafik, Nasrul; Pranoto, Indro; Widyaparaga, Adhika
Journal of Mechanical Engineering Science and Technology (JMEST) Vol 9, No 1 (2025)
Publisher : Universitas Negeri Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.17977/um016v9i12025p126

Abstract

This study examined how surface roughness and nanoceramic coating, influences the boiling heat transfer coefficient (BHTC) and critical heat flux (CHF) of a conical cylindrical copper test specimen. Three test specimens exhibiting surface roughness of 0.22 µm, 0.14 µm, and 0.04 µm were analyzed for comparison. Two additional test specimens were treated with nanoceramic coatings utilizing silicon carbide as the base material: one specimen received a single-layer coating and the second was applied with a double-layer coating. The behavior of the bubbles was closely observed with a high-speed camera to deepen the analysis. The experimental results showed that the test specimen with higher surface roughness exhibited higher BHTC and CHF. The 0.22 µm surface roughness specimen demonstrated a 55.69% greater BHTC than the 0.04 µm surface roughness specimen. In contrast, the 0.04 µm surface roughness specimen had the lowest CHF, 426.09 kW/m². Nanoceramic coating also enhanced the BHTC and CHF. The specimen with a single-layer coating had the highest BHTC, 40.81% higher than the uncoated specimen. The specimen with a double-layer coating showed a 60.12% increase in CHF compared to the specimen with a single-layer coating. The bubble observation results indicated that test specimens with higher BHTC and CHF had more active nucleation sites. The quantity of active nucleation sites plays a vital role in producing a large number of bubbles, enhancing heat transfer, and maintaining the surface temperature.
Co-Authors Achmad Aminudin Achmad Rifqi In'Amullah Adhe Reza Firmansyah Adhika Widyaparaga Agus Triono Ahmad Adib Rosadi Ahmad Adib Rosyadi Ahmad Iqbal Fawaid Ahmad Syuhri Ahmad Zainuri Alfariz, Mohammad Rifqy Alfian Futuhul Hadi Alfons Erick Perkasa Alfons Erick Perkasa, Alfons Erick Ali, Reynaldi Akbar Alief Muhammad Aliyansyah, Berly Amirul Yahya Andi Sanata Andi Sanata Apip Amrullah Arifin, Moch Miftahul Aris Zainul Muttaqin As’adi GA, As’adi As’adi GA Atlanta Iwananda Audiananti Meganandi Kartini Audiananti Meganandi Kartini Bekti Palupi Cahya Alief Prasetyo Cahyadi, Tedi Setiawan Cahyani, Elisna Tirta Danang Yudistiro Danang, Yudistiro Dani Hari Tunggal Prasetiyo Dani Hari Tunggal Prasetiyo Dedi Dwilaksana Deny Tomy Andrianto Deny tomy andrianto Digdo Listyadi, Digdo Dimas Endrawan, Putra Djoko Wahyudi Dony Perdana Dwi Djumhariyanto Faiz Firdausi Fiqih Muhammad Firdausah, Risco Eka Firdiansyah, Alfian Freitas, Domingos de Sousa Frenico A.O. Fx. Kristianta Gaguk Jatisukamto GAMMA ADITYA RAHARDI Haidzar Nurdiansyah Halimatus Sa'diyah Halimatus Sa’diyah Hari Arbiantara Hari Arbiantara Basuki Hari Arbiantara, Hari Hary Sutjahjono Ibnu, Muhammad Khadafi Imam Rudi Sugara Imam Sholahuddin Indro Pranoto Intan Hardiatama Ivan Bagus Sanjaya Junus, Sallahudin Kristianta, Franciscus Xaverius Kristianta, Fransiscus Xaverius Kurniawan, Eva Kustanto Muh. Nurkoyim Kustanto, Muh. Nurkoyim Luh Putu Ratna Sundari Lukman Hakim Lukman Hakim M Katibi Vanhas M. Agung Fauzi M. Agung Fauzi, M. Agung M. Fahrur Rozy Hentihu M. Fathuddin Noor, M. Fathuddin M. Katibi Vanhas Mahmud, Rizal Mahros Darsin Masruri Wardhana Misto Misto Moch. Rizal A. Y. Moch. Rizal A. Y., Moch. Mochamad Asrofi Mochamad Edoward Ramadhan Moh. Nurkoyim Moh. Nurkoyim Kustanto Mubiyn, Shidqi Nur Muh Nurkoyim Kustanto Muh Nurkoyim Kustanto Muh. Nurkoyim Kustanto Muh. Nurkoyim, Kustanto Muhammad Dimyati Nashrullah Muhammad Dimyati Nashrullah Muhammad Izzuddin Al Haq Muhammad Lutfi Azis Muhammad Nur Cahyo Hidayat Nasrullah Muhammad Nurkoyim Nofal Kharis Nofal Kharis Kharis Nugraha, Raafi Aditya Nur Widodo Nurkoyim Kustanto, Muh Puji Kristianto Putra Dimas Endrawan Putra, Dimas Endrawan Qoyinul Amin Rahma Rei Sakura Rika Dwi Hidayatul Qoryah Rima Zidni Karimatan Nisa Rizal Mahmud Robertoes Koekoeh K.W. Sa'diyah, Halimatus Salahuddin Junus Santoso Mulyadi Saputra, Toni Haikal Setyo Pambudi Setyo Pambudi Solahuddin, Imam Sumarji Sumarji Suyitno Syahriza, Mochamad Rifki Syuhri, Skriptyan N.H. Syuhri, Skriptyan Noor Hidayatullah Tanu Alifuddin D. S Taqdissillah, Doohan Trifiananto, Muhammad Welayaturromadhona Wibowo, Robertoes Koekoeh Koentjoro Widyaningrum Febriolita wigo ardi winarko Wisnu Kuncoro yudan priyo anggono Yuni Hermawan Yusron Maulana, Raden Muhammad