CFD-Driven Optimization of Intake Manifold Design for Enhanced Volumetric Efficiency and Performance in Formula SAE Internal Combustion Engines
DOI:
https://doi.org/10.54536/jsere.v1i2.4934Keywords:
Airflow Optimization, Computational Fluid Dynamics (CFD), Design Optimization, Engine Performance, Formula SAE, Intake Manifold, Internal Combustion Engine, Steady-State Analysis, Turbulence Modeling, Volumetric EfficiencyAbstract
This study investigates the optimization of an internal combustion engine (ICE) intake manifold through the application of Computational Fluid Dynamics (CFD) analysis, aiming to enhance volumetric efficiency and overall engine performance, particularly within the context of Formula SAE applications. The research employs steady-state CFD simulations to rigorously assess airflow dynamics, pressure distribution, and turbulence characteristics across a variety of intake runner configurations. Critical design parameters, including runner length, plenum volume, and restrictor geometry, are meticulously analyzed to mitigate cylinder-to-cylinder variation and maximize airflow uniformity. The findings reveal that optimized intake manifold geometries, including straight-runner designs, can enhance turbulent kinetic energy by as much as 11% while concurrently diminishing flow disparities among cylinders. Supersonic flow conditions (Mach > 1) are detected in proximity to critical sections, thereby underscoring the necessity for precise geometric tuning to alleviate compressibility effects. The selection of materials, specifically Glass Fiber Reinforced Plastic (GFRP), is substantiated based on its thermal and structural appropriateness. This study emphasizes the effectiveness of CFD-driven design methodologies in reducing development costs and timeframes, all while facilitating performance enhancements. Future research endeavors should incorporate transient CFD models and experimental validation to further optimize dynamic engine performance in authentic racing scenarios.
References
Ahsan, M., & Noman, M. (2024). Improving Internal Combustion Engine Performance through Inlet Valve Geometry and Spray Angle Optimization: Computational Fluid Dynamics Study. Engineering Proceedings, 72(1), 6. https://doi.org/10.3390/engproc2024072006
Bondar, V., Aliukov, S., Malozemov, A., & Das, A. (2020). Mathematical model of thermodynamic processes in the intake manifold of a diesel engine with fuel and water injection. Energies, 13(17), 4315. https://doi.org/10.3390/en13174315
Cecere, G., Irimescu, A., & Merola, S. S. (2023). Design of an Optically Accessible Intake Manifold for Characterization of Liquid and Gaseous Jets in PFI Operating Conditions. Designs, 7(1), 24. https://doi.org/10.3390/designs7010024
Ezechukwu, V. C., Braide, T. K., Onyenanu, I. U., Ayadinuno, G., Agwaziam, J. O., & Ojinekeya, C. O. (2025). Structural Simulation Analysis of the Developed Hybrid of Aluminum Composites and Carbon Nanotube Brake Disc. International Journal of Applied and Natural Sciences, 3(1), 18–28. https://doi.org/10.61424/ijans.v3i1.195
Ezechukwu, V. C., Onyenanu, I. U., Ayadinuno, G., & Agwaziam, J. O. (2025). Structural simulation analysis of the developed hybrid of Momordica angustisepala fiber and Breadfruit seed-shell particles composites, Bolted Flanges. IPS Journal of Engineering and Technology, 1(1), 13–20. https://doi.org/10.54117/ijet.v1i1.2
Goyal, H., Jones, P., Bajwa, A., Parsons, D., Akehurst, S., Davy, M. H., Leach, F. CP., & Esposito, S. (2024). Design trends and challenges in hydrogen direct injection (H2DI) internal combustion engines – A review. International Journal of Hydrogen Energy, 86, 1179–1194. https://doi.org/10.1016/j.ijhydene.2024.08.284
Halis, S., & Kocakulak, T. (2024). RSM-based optimization of lambda and mixed fuel concentration parameters of an LTC mode engine. Energy, 306. 132550. https://doi.org/10.1016/j.energy.2024.132550
Jugu, E. B., Onyenanu, I. U., & Nwobi-Okoye, C. C. (2025). Finite Element Analysis and Factorial Optimization of Heat Treatment Flaws in CNG Pressure Vessels: Implications for Structural Integrity and Safety. Scientific Journal of Engineering, and Technology, 2(1), Article 1. https://doi.org/10.69739/sjet.v2i1.487
Kammuang-lue, N., & Borikhut, W. (2015). Development of intake manifold for Student Formula CMU F-914 using theoretical and simulated designs. Food Agricultural Sciences and Technology, 1(2), 39–45. retrieved from https://ph02.tci-thaijo.org/index.php/stej/article/view/251356
Liang, T., Liu, J., Mo, H., Lee, C., Wang, Z., Li, Z., & Cong, M. (2025). Effects of operating conditions on flame evolution and preheating performance of intake manifold burner aided by spray atomization. International Journal of Heat and Fluid Flow, 112, 109730. https://doi.org/10.1016/j.ijheatfluidflow.2024.109730
Luo, F., Wang, C., Xue, F., Ye, B., & Wu, X. (2016). A Study on the Influence of Fuel Pipe on Fuel Injection Characteristics of Each Nozzle Hole in Diesel Injector. MATEC Web of Conferences, 40, 02016. https://doi.org/10.1051/matecconf/20164002016
Mohamad, B., Karoly, J., & Zelentsov, A. (2020). CFD modelling of formula student car intake system. Facta Universitatis, Series: Mechanical Engineering, 18(1), 153-163. https://doi.org/10.22190/FUME190509032M
Nikolaev, V. K., Skvortsov, A. A., Khudayarov, Z. F., & Nikolaev, R. S. (2025). Optimization of the exhaust catalytic manifold of an internal combustion engine. Journal of Materials Science: Materials in Engineering, 20(1), 30. https://doi.org/10.1186/s40712-025-00238-3
Onyenanu, I. U., Swift, O. N. K., & Atanmo, P. N. (2015). Design and Analysis of a Tubular Space Frame Chassis for FSAE Application. International Journal of Emerging Technologies and Innovative Research (JETIR), 2(10), 134-140. http://www.jetir.org/papers/JETIR1510025.pdf
Pszczółkowski, J. (2022). The model for cylinder charge parameters during engine starting. Combustion Engines, 188(1), 60–66. https://doi.org/10.19206/CE-142029
Ragupathi, P., Rajkumar, S., & Hussain, R. S. (2014). Design and analysis of diesel engine intake manifold using CFD simulation. International Journal of Modern Trends in Engineering and Science, 1(1), 174-179. https://www.researchgate.net/publication/323393337_Design_and_Analysis_of_Diesel_Engine_Intake_Manifold_using_CFD_Simulation
Sawant, S. S., Gurav, P. N., Nivalkar, P. S., Sawant, P. M., & Waghmare, D. S. N. (2018). Design And Fabrication of Air Intake for FSAE Race Car. IJSART, 4(2).
Shelagowski, M., & Mahank, T. (2015). CFR Formula SAE intake restrictor design and performance. In Proceedings of the 2015-ASEE North Central Section Conference American Society for Engineering Education. https://asee-ncs.org/wp-content/uploads/2021/12/proceedings/2015/Paper%20files/Student_Papers/2015_ASEE_NCS_Conference_submission_29.pdf
Shin, K., Son, S., Moon, J., Jo, Y., Kwon, J. S.-I., & Hwang, S. (2022). Dynamic modeling and predictive control of boil-off gas generation during LNG loading. Computers & Chemical Engineering, 160, 107698. https://doi.org/10.1016/j.compchemeng.2022.107698
Souza, G. R. de, Pellegrini, C. de C., Ferreira, S. L., Soto Pau, F., & Armas, O. (2019). Study of intake manifolds of an internal combustion engine: A new geometry based on experimental results and numerical simulations. Thermal Science and Engineering Progress, 9, 248–258. https://doi.org/10.1016/j.tsep.2018.12.003
Talati, H., Aliakbari, K., Ebrahimi-Moghadam, A., Khoshbakht Farokhad, H., & Eskandary Nasrabad, A. (2022). Optimal design and analysis of a novel variable-length intake manifold on a four-cylinder gasoline engine. Applied Thermal Engineering, 200, 117631. https://doi.org/10.1016/j.applthermaleng.2021.117631
Thamaraikanan, R., Anish, M., Kanimozhi, B., George, T., & Koshy, V. G. (2015). Design and Analysis of an Intake Manifold in an IC Engine. Applied Mechanics and Materials, 766–767, 1021–1027. https://doi.org/10.4028/www.scientific.net/AMM.766-767.1021
Ukachi, P., Okonkwo, U. C., & Onyenanu, I. U. (2024). Appraisal of the Insulation Potential of Rice Husk Ash Reinforced Calabash-Epoxy Composite for Vehicle Firewall Application. International Journal of Engineering Research, 13(08). https://doi.org/10.17577/IJERTV13IS080018
Ukwu, N. O., Onyenanu, I. U., & Atanmo, P. N. (2016). Design and Analysis of FSAE Brake System using locally sourced Material”, International Journal of Emerging Technologies and Innovative Research (JETIR), 3(2), 82-89, Available: http://www.jetir.org/papers/JETIR1602018.pdf
Verma, M. K., Verma, D., & Shukla, A. Design & Optimization of Intake Manifold of Carburetor Using Computational Fluid Dynamics. Momentum, 11, 0. https://www.academia.edu/114160321/design_and_optimization_of_intake_manifold_of_carburetor_using_computational_fluid_dynamics
Wable, P. V., & Shah, S. S. (2017). Air flow optimization of venturi type intake restrictor. International Journal of Engineering Development and Research, 5(4), 483-489. https://rjwave.org/ijedr/viewpaperforall.php?paper=IJEDR1704075
Xu, R. (2020). The Relationship between Volume & Pressure and Rotation & Torque in an Engine Cylinder. Saudi Journal of Engineering and Technology, 5(11), 484–485. https://doi.org/10.36348/sjet.2020.v05i11.015
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