EFFECT OF FREE STREAM MACH NUMBER ON A MIXED COMPRESSION INLET PERFORMANCE

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EBRAHIMI ABBAS; ZARE CHAVOSHI MAJID

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Journal: Modares Mechanical Engineering Year:2016 | Volume:16 | Issue:7 Page(s): 275-284

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Title

EFFECT OF FREE STREAM MACH NUMBER ON A MIXED COMPRESSION INLET PERFORMANCE

Author(s)

EBRAHIMI ABBAS | ZARE CHAVOSHI MAJID | Issue Writer Certificate

Keywords

MIXED COMPRESSION INLETQ1

SUPERSONIC AXISYMMETRIC FLOWQ1

MULTI-BLOCK GRIDQ2

SPALART-ALLMARAS TURBULENT MODELQ1

ROE FLUX DIFFERENCE SPLITTING METHODQ1

Abstract

Inlet performance is an important field in aerodynamic design of aerial vehicle engines. This study focuses on numerical investigation of Mach number effects on a supersonic axisymmetric MIXED COMPRESSION INLET performance. For this purpose, a density based finite volume CFD code has been developed. A structured MULTI-BLOCK GRID and an explicit time discretization of Reynolds averaged Navier-Stokes (RANS) equations have been used. Furthermore, Roe’s approximated Riemann solver has been utilized for computing inviscid flux vectors. Also, the monotone upstream centered schemes for conservation laws (MUSCL) extrapolation with Van Albada limiter have been used to obtain second order accuracy. In addition, Spalart-Allmaras one-equation turbulence model has been used to close the governing equations. The code is validated in three test cases by comparing numerical results against experimental data. Finally, the code has been utilized for numerical simulation of a specific supersonic MIXED COMPRESSION INLET. The effects of free stream Mach number on performance parameters, including mass flow ratio (MFR), drag coefficient, total pressure recovery (TPR), and flow distortion (FD) have been discussed and investigated. Results show that increase in Mach number, leads to decrease in TPR and drag coefficient; however, MFR and FD increase. Also, FD variations with respect to other performance parameters are significant, such that increase in Mach number from 1.8 to 2.2 leads to more than 100% FD increment while increase in MFR is less than 10%. By using this code it will be possible to design, performance parametric study, and geometrical optimization of axisymmetric supersonic inlet.

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APA: Copy

EBRAHIMI, ABBAS, & ZARE CHAVOSHI, MAJID. (2016). EFFECT OF FREE STREAM MACH NUMBER ON A MIXED COMPRESSION INLET PERFORMANCE. MODARES MECHANICAL ENGINEERING, 16(7), 275-284. SID. https://sid.ir/paper/178329/en

Vancouver: Copy

EBRAHIMI ABBAS, ZARE CHAVOSHI MAJID. EFFECT OF FREE STREAM MACH NUMBER ON A MIXED COMPRESSION INLET PERFORMANCE. MODARES MECHANICAL ENGINEERING[Internet]. 2016;16(7):275-284. Available from: https://sid.ir/paper/178329/en

IEEE: Copy

ABBAS EBRAHIMI, and MAJID ZARE CHAVOSHI, “EFFECT OF FREE STREAM MACH NUMBER ON A MIXED COMPRESSION INLET PERFORMANCE,” MODARES MECHANICAL ENGINEERING, vol. 16, no. 7, pp. 275–284, 2016, [Online]. Available: https://sid.ir/paper/178329/en

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