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All Journal IQRO: Journal of Islamic Education JTTM: Jurnal Terapan Teknik Mesin
Sarjito
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Aerospace Engineering Control & Systems Engineering Education Engineering Mechanical Engineering

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Computational Fluid Dynamic Analysis of Turbo Cyclone and Intake Manifold Spacer on Honda Supra Fit Sarjito; Sandhika Putra Pratama; Wijianto; Subroto
JTTM : Jurnal Terapan Teknik Mesin Vol 3 No 1 (2022): JTTM: Jurnal Terapan Teknik Mesin
Publisher : Teknik Mesin - Sekolah Tinggi Teknologi Muhammadiyah Cileungsi

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37373/jttm.v3i1.161

Abstract

The need for human mobility is constantly increasing over time, so the demand for vehicle production mass is still relatively high. A large number of conventional vehicle use makes the impact of dependence on fuel oil. This dependence is very threatening for various aspects. Increasing the combustion efficiency in the engine room is necessary. Turbo cyclone is an additional component applied to the intake manifold, which causes the originally linear inflow to rotate (swirl) and mix fuel with air more maximally in the combustion engine to increase the combustion efficiency. Recently, we fabricated and characterized turbo cyclone and intake manifold spacer to increase the combustion engine's performance. Turbo cyclone designed in two different blades with a degree 400 with an angle of inclination blade. Intake manifold spacer designed with 24 grooves with a 400 angle. A selected sample in this research is the Honda Supra Fit 125CC year 2006. In this study, to increase the combustion engine's performance, we applied the 3-blade turbo cyclone and 4-blade turbo cyclone in the air filter. We applied an intake manifold spacer between the combustion engine and carburetor. Computational Fluid Dynamic (CFD) of turbo cyclone and intake manifold spacer is shown the changing in velocity, pressure, and turbulence intensity. The specific result shown in 4-blade turbo cyclone with change in velocity is 0.14009 m/s, with pressure drop -0.04582 Pa, and the change of turbulence intensity value is 2.44536 % explain that the turbulence condition is a medium-turbulence case. The unspecific result in the intake manifold spacer shows only a change in velocity 0.26269 m/s with a pressure drop of only -0.00673 Pa, which means the inner flow profile is almost linear. It proves from turbulence intensity value only 0.41247 % explain that internal air-flow in low-turbulence flow condition. Based on turbulence case from turbulence intensity, it has shown increased performance in the medium-turbulence case. These results suggest that turbo cyclone and intake manifold spacer can increase the performance of combustion engines.
Enhancing Teacher Professionalism through Organizational Citizenship Behavior (OCB): The Role of Principal Leadership in Junior High School Sarjito; Nyoman, Ngurah Ayu; Prayito, Muhammad
IQRO: Journal of Islamic Education Vol. 7 No. 2 (2024): DESEMBER 2024
Publisher : Prodi Pendidikan Agama Islam FTIK IAIN Palopo

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.24256/iqro.v7i2.7889

Abstract

This study aims to analyze the role of school principals in developing Organizational Citizenship Behavior (OCB) to enhance teacher professionalism at SMP Negeri 3 Batang. A qualitative phenomenological approach was employed. Data were collected through in-depth interviews, observations, and documentation, and analyzed using triangulation techniques. The findings reveal three key aspects of the principal’s role: (1) planning, by integrating OCB values into school programs; (2) implementation, through teachers’ voluntary practices such as assisting colleagues, supporting school activities, and engaging beyond formal duties; and (3) monitoring, carried out via academic supervision, evaluations, and recognition of proactive teachers. The study concludes that the application of OCB significantly strengthens teacher professionalism in pedagogical, social, and professional dimensions. These findings underscore the significance of school leadership as a crucial strategy for enhancing educational quality.
Co-Authors I Ketut Suada Muhammad Prayito Nyoman, Ngurah Ayu Sandhika Putra Pratama Subroto