Multi-Regime CFD Optimization of Diverter-less Supersonic Intake Bump Geometry for Enhanced Engine Pressure Recovery

Muhammad Ali; Haroon Saqlain Khan; Mudasir Ghafoor; Saad Mujtaba

doi:10.55524/ijircst.2025.13.3.24

Abstract

Aircraft intake plays a vital role in overall performance of the aircraft. Purpose of intake is to supply less turbulent and smooth flow to the engine. It must provide maximum pressure recovery for a wide range of operating conditions. Conventional ramp intakes have been used in many older and few modern fighter aircraft (F4 Phantom II, Mig 21, Mig 27, Mirage 2000 & F-14 Tomcat). However, DSI (Diverter Less Supersonic Intake) were used in modern aircraft (JF -17 Block 3, F- 35 & J -20). Weight, complexity & maintenance cost can be reduced using DSI compared in comparison to the conventional intake. Furthermore, DSI provides higher pressure recovery, lesser boundary layer & less complex geometry. The aim of this research is to model different bump configurations and carry out their CFD analysis in order to establish high performing configuration of DSI air intakes at subsonic & supersonic regimes. Four bump configurations named as smaller, softer, blunter and original bump were modelled in ANSYS at three different speed regimes (Mach No 0.6, 0.95 & 1.5) & comparison was drawn for each type of DSI bump configuration & it was found that pressure recovery of DSI of all four configuration is approximately same in subsonic regions whereas for transonic regime (Mach 0.95) DSI smaller has highest pressure recovery value of 0.868 & supersonic regime bump original has highest pressure recovery value of 0.779. This shows that smaller & smoother bump intake configuration will provide maximum pressure recovery and its position into the air intake is crucial for the pressure recovery.

Keywords

CFD, Supersonic Intake, Bump Geometry,Engine Pressure Recovery

References

Seddon, J. and E. L. Goldsmith, Intake aerodynamics. Washington, D.C.: American Institute of Aeronautics & Astronautics, 1999.
Sóbester, A., "Tradeoffs in jet inlet design: A historical perspective," Journal of Aircraft, vol. 44, no. 3, pp. 705–717, 2007. Available from: https://doi.org/10.2514/1.26830
Javaid, M. T., Sajjad, U., ul Hassan, S. S., Nasir, S., Shahid, M. U., Ali, A., and Salamat, S., "Power enhancement of vertical axis wind turbine using optimum trapped vortex cavity," Energy, vol. 278, 127808, 2023. Available from: https://doi.org/10.1016/j.energy.2023.127808
Nasir, S., Zainab, H., and Hussain, H. K., "Artificial-Intelligence Aerodynamics for Efficient Energy Systems: The Focus on Wind Turbines," BULLET: Jurnal Multidisiplin Ilmu, vol. 3, no. 5, pp. 648–659, 2024. Available from: https://tinyurl.com/45u7m3xu
ul Hassan, S. S., Javaid, M. T., Rauf, U., Nasir, S., Shahzad, A., and Salamat, S., "Systematic investigation of power enhancement of Vertical Axis Wind Turbines using bio-inspired leading-edge tubercles," Energy, vol. 270, 126978, 2023. Available from: https://doi.org/10.1016/j.energy.2023.126978
Hoyle, N., Bressloff, N., and Keane, A., "Design optimization of an engine air intake," 2005. Available from: https://eprints.soton.ac.uk/41988/
Valorani, M., et al., "Optimal supersonic intake design for air collection engines (ACE)," Acta Astronautica, vol. 45, no. 12, pp. 729–745, 1999. Available from: https://doi.org/10.1016/S0094-5765(99)00185-X
Tahir, R. B., Analysis of Shock Dynamics in Supersonic Intakes, 2009. Available from: https://tinyurl.com/mrtday5c
Cui, K., et al., "Conceptual design and aerodynamic evaluation of hypersonic airplane with double flanking air inlets," Science China Technological Sciences, vol. 56, no. 8, pp. 1980–1988, 2013. Available from: https://link.springer.com/article/10.1007/s11431-013-5288-0
Raza, A., Farhan, S., Nasir, S., and Salamat, S., "Applicability of 3D printed fighter aircraft model for subsonic wind tunnel," in 2021 Int. Bhurban Conf. Applied Sciences and Technologies (IBCAST), pp. 730–735, 2021. Available from: https://ieeexplore.ieee.org/abstract/document/9393214
Nasir, S., Javaid, M. T., Shahid, M. U., Raza, A., Siddiqui, W., and Salamat, S., "Applicability of Vortex Lattice Method and its Comparison with High Fidelity Tools," Pakistan Journal of Engineering and Technology, vol. 4, no. 1, pp. 207–211, 2021. Available from: https://doi.org/10.51846/vol4iss1pp207-211
Shahid, M. U., Javaid, M. T., Nasir, S., Sajjad, U., Haider, F., ul Hassan, S. S., and Salamat, S., "Development and Fidelity Assessment of Potential Flow based Framework for Aerodynamic Modeling of High Lift Devices," Pakistan Journal of Engineering and Technology, vol. 5, no. 2, pp. 104–111, 2022. Available from: https://doi.org/10.51846/vol5iss2pp104-111
Sahibzada, S., Malik, F. S., Nasir, S., and Lodhi, S. K., "AI-Augmented Turbulence and Aerodynamic Modelling: Accelerating High-Fidelity CFD Simulations with Physics-informed Neural Networks," International Journal of Innovative Research in Computer Science and Technology, vol. 13, no. 1, pp. 91–97, 2025. Available from: https://tinyurl.com/bdcrw2ak
Sahibzada, S., Malik, F. S., Nasir, S., and Lodhi, S. K., "Generative AI Driven Aerodynamic Shape Optimization: A Neural Network-Based Framework for Enhancing Performance and Efficiency," International Journal of Innovative Research in Computer Science and Technology, vol. 13, no. 1, pp. 98–105, 2025. Available from: https://tinyurl.com/57frh49x
Nasir, S., Sahibzada, S., and Malik, F. S., "Adjoint-Based Optimization for Enhanced Aerodynamic Performance Using Multi-Parameterization Techniques," International Journal of Innovative Research in Computer Science and Technology, vol. 13, no. 2, 2025. Available from: https://tinyurl.com/2u9jwejw
Ahmad, M., et al., "Experimental Investigation of Wing Accuracy Quantification using Point Cloud and Surface Deviation," Pakistan Journal of Engineering and Technology, vol. 4, no. 2, pp. 13–20, 2021. Available from: https://doi.org/10.51846/vol4iss2pp13-20
Creta, F. and Valorani, M., "Optimal Shape Design of Supersonic, Mixed-Compression, Fixed-Geometry Air Intakes for SSTO Mission Profiles," in 38th AIAA/ASME/SAE/ASEE Joint Propulsion Conf. & Exhibit, 2002. Available from: https://doi.org/10.2514/6.2002-4133
Khan, O. and Masud, J., "Evaluating an Experimental Streamlined Fairing for a Diverter Less Supersonic Inlet (DSI) Equipped Aircraft," 2016. Available from: https://doi.org/10.2514/6.2016-1566
Neale, M. and Lamb, P., Tests with a variable ramp intake having combined external/internal compression and a design Mach number of 2.2. London: HM Stationery Office, 1965. Available from: https://tinyurl.com/nheujxur
Fisher, S., Neale, M., and Brooks, A., On the sub-critical stability of variable ramp intakes at mach numbers around 2. Citeseer, 1970. Available from: https://reports.aerade.cranfield.ac.uk/handle/1826.2/2987
Kim, S. D. and Song, D. J., "Numerical study on performance of supersonic inlets with various three-dimensional bumps," Journal of Mechanical Science and Technology, vol. 22, no. 8, pp. 1640–1647, 2008. Available from: https://link.springer.com/article/10.1007/s12206-008-0503-9
Svensson, M., "A CFD Investigation of a Generic Bump and its Application to a Diverterless Supersonic Inlet," 2008.
Masud, J. and Akram, F., "Flow field and performance analysis of an integrated diverterless supersonic inlet," Aeronautical Journal, vol. 115, no. 1170, p. 471, 2011. Available from: https://doi.org/10.1017/S0001924000006114
Watanabe, Y. and Murakami, A., "Control of supersonic inlet with variable ramp," in Proc. ICAS, 2006. Available from: https://tinyurl.com/sac5wk4s
Ferguson, F., Dasque, N., and Dhanasar, M., "Waverider Design and Analysis," Aeronautical Journal, 2015. Available from: https://doi.org/10.2514/6.2015-3508
Romander, E., Norman, T. R., and Chang, I.-C., "Correlating CFD simulation with wind tunnel test for the full-scale UH-60A airloads rotor," in Proc. 67th American Helicopter Society International Annual Forum, 2011. Available from: https://ntrs.nasa.gov/citations/20110014374
Alexander, D., Jenkins, H., and Jones, P., "A comparison of wind tunnel and CFD methods applied to natural ventilation design," in Proceedings of Building Simulation, 1997. Available from: https://tinyurl.com/5yybbk2d

Cites this article as

M. Ali, H. S. Khan, M. Ghafoor, S. Mujtaba, "Multi-Regime CFD Optimization of Diverter-less Supersonic Intake Bump Geometry for Enhanced Engine Pressure Recovery", International Journal of Innovative Research in Engineering & Management (ijircst), Vol-13, Issue-3, Page No-162-178, 2025. Available from: https://doi.org/10.55524/ijircst.2025.13.3.24

Corresponding Author

Muhammad Ali

Graduate Researcher, Department of Mechanical and Materials Engineering, Western University, Canada

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