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All Journal Turbo : Jurnal Program Studi Teknik Mesin JURNAL CRANKSHAFT Jurnal Polimesin
Anisah Nurul Izzah
Universitas Pembangunan Nasional Veteran Jawa Timur
Automotive Engineering Control & Systems Engineering Energy Engineering Materials Science & Nanotechnology Mechanical Engineering

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Karakteristik Pembakaran Droplet Campuran Bensin Oktan Rendah dengan Penambahan Minyak Kulit Jeruk Musyaroh; Anisah Nurul Izzah; Rizqa Ruviana; Fatkhurrohman; Tria Puspa Sari; Widya Wijayanti
TURBO [Tulisan Riset Berbasis Online] Vol 15 No 1 (2026): TURBO: Jurnal Program Studi Teknik Mesin
Publisher : Universitas Muhammadiyah Metro

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24127/trb.v15i1.4741

Abstract

The use of waste as an alternative fuel is being continually developed to support the clean energy transition. Orange peel oil (OPO) contains limonene, a volatile hydrocarbon compound with double bonds that has the potential to be used as a gasoline additive. However, studies directly examining its effect on droplet combustion characteristics are still limited. This study aims to fill this gap by evaluating the droplet combustion dynamics of a mixture of low-octane gasoline and OPO through visual and thermal approaches. Experiments were conducted by burning 10 µL droplets using a metal stand, with the essential oil concentration varying from 1% to 100%. Visualization was performed using a high-speed camera, and temperature measurements were carried out with a K-type thermocouple. The results showed that the addition of OPO prolonged the combustion time, decreased the combustion rate constant, and increased the maximum temperature. Microexplosions were observed starting at concentrations ≥25%, due to differences in boiling points between the components. Flame visualization confirmed the quantitative results, with brighter and longer-lasting flames at higher concentrations. This study concludes that OPO can significantly modify the droplet combustion characteristics and shows potential as a waste-based biofuel additive, which can improve the efficiency and sustainability of gasoline combustion systems
Investigation on hardness and microstructural behavior of mahogany–brass reinforced bio-composite brake pads under varying compaction pressure Fatkhurrohman Fatkhurrohman; Rizqa Ruviana; Musyaroh Musyaroh; Anisah Nurul Izzah
Jurnal Polimesin Vol 24, No 2 (2026): April
Publisher : Politeknik Negeri Lhokseumawe

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.30811/jpl.v24i2.8593

Abstract

The gradual elimination of asbestos in brake pad manufacturing has intensified the search for sustainable and non-toxic friction materials. This study presents waste-based bio-composite brake pads reinforced with mahogany sawdust and brass shavings, fabricated using a compaction-sintering approach. The scientific novelty of this study lies in the combined influence of reinforcement composition and compaction pressure on the microstructure-hardness relationship of wood-metal hybrid composites for brake pad applications. The effects of varying mahogany-to-brass ratio and compaction pressure on Shore D hardness and morphological characteristics were systematically evaluated. The results showed that increasing compaction pressure and reinforcement proportion improved composite densification and interfacial bonding, thereby increasing hardness. Increased hardness indicates better structural integrity and load-bearing capacity, which are important mechanical requirements for brake pad materials. The highest hardness value of 76.6 Shore D was obtained at a pressure of 3400 psi with a 4:4 composition, while the lowest value of 70.6 Shore D occurred at 3000 psi with a 1:4 ratio. These findings highlight the role of controlled compaction and balanced hybrid reinforcement in tailoring the mechanical characteristics of sustainable brake pad composites, supporting the potential utilization of wood and metal waste as environmentally friendly friction material components.
Flow Structures and Performance Characteristics of a Savonius Wind Turbine Under Varying Wind Speeds and Blade Angles Tria Puspa Sari; Anisah Nurul Izzah; Muhammad Hendra Budi Satria; M. Danny Pratama Lamura; Musyaroh; Dhia Fairuz Shabrina
JURNAL CRANKSHAFT Vol. 9 No. 1 (2026): Jurnal Crankshaft Vol. 9 No. 1 (2026)
Publisher : Badan Penerbit Universitas Muria Kudus

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24176/cra.v9i1.16912

Abstract

Savonius wind turbines belong to the class of vertical-axis wind turbines (VAWTs) and are well known for the ability to self-start at low wind speeds without the need for yaw control. Despite these advantages, their aerodynamic efficiency remains lower than that of horizontal-axis wind turbines (HAWTs). In this study, the flow structures and performance characteristics of a Savonius wind turbine are examined using streamline visualization under varying wind speeds ranging from 8 to 10 m/s and blade angles between 100° and 130°. The Reynolds number variations reflect changes in the flow regime and momentum exchange caused by different wind speeds and blade orientations. Across all wind speeds, the 120° blade angle consistently resulted in the most favorable flow conditions. Streamline visualization highlights key flow features, including flow separation, vortex development, and wake structures, which play a critical role in determining aerodynamic efficiency and energy capture. By directly relating Reynolds number variations to observable flow phenomena, this study offers practical insights for aerodynamic optimization. The findings contribute to the development of more efficient Savonius wind turbine designs, particularly for applications in low to moderate wind environments.
Co-Authors Dhia Fairuz Shabrina Fatkhurrohman Fatkhurrohman Fatkhurrohman M. Danny Pratama Lamura Muhammad Hendra Budi Satria Musyaroh Musyaroh Musyaroh Rizqa Ruviana Tria Puspa Sari Tria Puspa Sari widya wijayanti