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All Journal Jurnal Pendidikan Vokasi Jurnal Pendidikan Teknologi dan Kejuruan VOLT : Jurnal Ilmiah Pendidikan Teknik Elektro Jurnal Sains dan Teknologi: Jurnal Keilmuan dan Aplikasi Teknologi Industri JURNAL PENDIDIKAN TAMBUSAI MOTIVECTION : Journal of Mechanical, Electrical and Industrial Engineering Suluah Bendang: Jurnal Ilmiah Pengabdian Kepada Masyarakat Teknomekanik Jurnal Aerasi Jurnal Vokasi Mekanika Journal of Engineering Researcher and Lecturer Venus: Jurnal Publikasi Rumpun Ilmu Teknik
Nabawi, Rahmat Azis
Department Of Mecahnical Engineering, Universitas Negeri Padang, INDONESIA
Humanities Automotive Engineering Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Education Electrical & Electronics Engineering Engineering Industrial & Manufacturing Engineering Mechanical Engineering Social Sciences Other

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Journal : Journal of Engineering Researcher and Lecturer

 1 
Study on U hull modifications with concave design to improve the tourist ship stability Syahril, Syahril; Nabawi, Rahmat Azis; Nasty, Aulia Zulkarnaen
Journal of Engineering Researcher and Lecturer Vol. 2 No. 2 (2023): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v2i2.96

Abstract

Stability is an important aspect that was studied in ship design as it relates to the safety of the ship when facing ocean waves. The tourist ship needed to have a good image in order to attract tourists to use its services. Good stability of the tourist ship was crucial in enhancing the image of the ship and attracting tourists to utilize its services. This research aimed to investigate the effect of concave on the U hull to improve ship stability. The study compared the stability test results of two hull designs: U hull with concave and without concave. The stability tests of both ship models were conducted through simulation methods. The simulations were performed under two conditions: when the tourist ship was empty and when it was fully loaded with passengers. The simulation results indicated that the design of the U hull with concave had a positive influence on ship stability, leading to improved stability. The concave design enhanced the ship's ability to return to its original position when encountering waves. Even in the presence of small waves, the tourist ship did not experience instability.  
A concave impeller: A new modified semi-open impeller for higher performance of centrifugal pumps Nabawi, Rahmat Azis; Fadillah, Egi; Mulyadi, Haris Shiddiq; Fahrezi, Muhammad Shadiq; Putra, Firza Fernanda
Journal of Engineering Researcher and Lecturer Vol. 4 No. 1 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i1.178

Abstract

The performance enhancement of centrifugal pumps is continuously pursued to meet increasingly complex operational demands. Ongoing improvements in pump component design, particularly the impeller, are essential to achieving optimal configurations. The impeller is a critical component that significantly influences the overall performance of centrifugal pumps. This study aims to develop an impeller design that offers higher performance compared to the original one. The methodology utilized was Computational Fluid Dynamics (CFD). The primary focus was on modifying the semi-open impeller type. Two modified impellers were developed with concave and convex design. They were simulated and compared to the original impeller configuration. The simulation results indicate that pressure distribution at the inlet remains similar for all designs. However, pressure variations at the outlet and differences in volumetric flow rate between inlet and outlet were found. The contour visualization of pressure and flow velocity for each impeller configuration shown from the CFD simulation results is further discussed, in terms of pressure distribution and flow trajectory pressure.
Study on U hull modifications with concave design to improve the tourist ship stability Syahril, Syahril; Nabawi, Rahmat Azis; Nasty, Aulia Zulkarnaen
Journal of Engineering Researcher and Lecturer Vol. 2 No. 2 (2023): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v2i2.96

Abstract

Stability is an important aspect that was studied in ship design as it relates to the safety of the ship when facing ocean waves. The tourist ship needed to have a good image in order to attract tourists to use its services. Good stability of the tourist ship was crucial in enhancing the image of the ship and attracting tourists to utilize its services. This research aimed to investigate the effect of concave on the U hull to improve ship stability. The study compared the stability test results of two hull designs: U hull with concave and without concave. The stability tests of both ship models were conducted through simulation methods. The simulations were performed under two conditions: when the tourist ship was empty and when it was fully loaded with passengers. The simulation results indicated that the design of the U hull with concave had a positive influence on ship stability, leading to improved stability. The concave design enhanced the ship's ability to return to its original position when encountering waves. Even in the presence of small waves, the tourist ship did not experience instability.  
A concave impeller: A new modified semi-open impeller for higher performance of centrifugal pumps Nabawi, Rahmat Azis; Fadillah, Egi; Mulyadi, Haris Shiddiq; Fahrezi, Muhammad Shadiq; Putra, Firza Fernanda
Journal of Engineering Researcher and Lecturer Vol. 4 No. 1 (2025): Regular Issue
Publisher : Researcher and Lecturer Society

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58712/jerel.v4i1.178

Abstract

The performance enhancement of centrifugal pumps is continuously pursued to meet increasingly complex operational demands. Ongoing improvements in pump component design, particularly the impeller, are essential to achieving optimal configurations. The impeller is a critical component that significantly influences the overall performance of centrifugal pumps. This study aims to develop an impeller design that offers higher performance compared to the original one. The methodology utilized was Computational Fluid Dynamics (CFD). The primary focus was on modifying the semi-open impeller type. Two modified impellers were developed with concave and convex design. They were simulated and compared to the original impeller configuration. The simulation results indicate that pressure distribution at the inlet remains similar for all designs. However, pressure variations at the outlet and differences in volumetric flow rate between inlet and outlet were found. The contour visualization of pressure and flow velocity for each impeller configuration shown from the CFD simulation results is further discussed, in terms of pressure distribution and flow trajectory pressure.
Co-Authors Abral, Hairul Aditia, Jefri Agung Pradana Putra Ahmad Sabirin Ahmad Sabirin Aldio, M. Fikhri Alwifari, M. Qari Ambiyar, Ambiyar Ambyar Ambyar Aminuyati Aprizal Saputra Arafat, Andril Arwizet Arwizet, Arwizet Arya Azis Zulhendrik Aulia, Ihsanul Budi Syahri Delima Yanti Sari Donny Fernandez Eko Indrawan Enjelita Enjelita Fadhil Naufan Fadillah, Egi Fahmi Rizal Fahrezi, Muhammad Shadiq Fauza, Anna Niska Febri Prasetya Fikriyyah Hilmy Ardana Fitra, Rizki Ganefri . Hendra Firdaus Hendra Irawan Hendri Nurdin Hendri Sawir, Hendri Husnul Fiqri Irzal Irzal Irzal Irzal Joko Suprianto Joko Suprianto Junil Adri Khairuni Delfi Anisa Muhamad Thaufiq Pinat Mulianti Mulyadi, Haris Shiddiq Musytari Rahmat Nasty, Aulia zulkarnaen Nelvi Erizon Nizwardi Jalinus Nofri Helmi Nurdin Hendri Permana, Kaesarion Rahman Preti, Agia Kulkarni Primawati Primawati, Primawati purwantono purwantono Purwantono, Purwantono Putra, Firza Fernanda Rahmat Rahmat Ravika Milya Refdinal Refdinal Rifelino Rifelino Rispendra, Rispendra Rodesri Mulyadi Salmat Salmat Salmat Salmat Salmat Salmat Salmat, Salmat Santika, Tiara Sasma Susanti Satria Sanurdi Sigit Dwi Lesmana Sukardi Sukardi Syahril Syahril Syahril Syahril Syahril Syahril Wahyu Ananda Putra Wahyudi Dwi Putra Wulansari, Rizky Ema Yaumal Arbi Yogi Dian Alfana Yufrizal A Zainal Abadi Zofa, Thifal Nefri Zuanda Maulana Nasution