Inlet Performance has an important role in the operation of air-breathing propulsion systems. In this study, performance of a supersonic axisymmetric mixed-compression inlet in the supercritical operating condition is numerically studied. The effects of free-stream Mach number and engine-face pressure on performance parameters, including mass flow ratio, drag coefficient, total pressure recovery, and flow distortion are investigated. To this sake, a multi-block density-based finite volume CFD code is developed and Reynolds-averaged Navier-Stokes equations with Spalart-Allmaras one-equation turbulence model is employed. The code is validated by comparing numerical results against other computational results and experimental data for two test cases of inviscid flow in a two-dimensional mixed-compression inlet and flow in an external compression inlet. Finally, the code is utilized for investigation of a specific supersonic mixed-compression inlet with the design Mach number of 2.0 and length to diameter ratio of 3.4. Results revealed that the increment of free-stream Mach number leads to decrease in total pressure recovery and drag coefficient, while mass flow ratio and flow distortion increase. The effects of engine-face pressure on performance parameters showed that by increasing the engine-face pressure, mass flow ratio and drag coefficient remain constant while total pressure recovery increases and flow distortion decreases.
Ebrahimi, A., Zare Chavoshi, M. (2018). Numerical Investigation of Back Pressure and Free-stream Effects on a Mixed Compression Inlet Performance. Scientia Iranica, 25(2), 751-761. doi: 10.24200/sci.2017.4324
MLA
Abbas Ebrahimi; Majid Zare Chavoshi. "Numerical Investigation of Back Pressure and Free-stream Effects on a Mixed Compression Inlet Performance". Scientia Iranica, 25, 2, 2018, 751-761. doi: 10.24200/sci.2017.4324
HARVARD
Ebrahimi, A., Zare Chavoshi, M. (2018). 'Numerical Investigation of Back Pressure and Free-stream Effects on a Mixed Compression Inlet Performance', Scientia Iranica, 25(2), pp. 751-761. doi: 10.24200/sci.2017.4324
VANCOUVER
Ebrahimi, A., Zare Chavoshi, M. Numerical Investigation of Back Pressure and Free-stream Effects on a Mixed Compression Inlet Performance. Scientia Iranica, 2018; 25(2): 751-761. doi: 10.24200/sci.2017.4324