Distortion elimination for serpentine inlet using coflow jet flow control with variation of mach numbers

Kewei Xu, Gecheng Zha

Research output: Chapter in Book/Report/Conference proceedingConference contribution


This paper numerically investigates Coflow Jet (CFJ) active flow control (AFC) for eliminating M2129 serpentine inlet distortion with throat Mach number (Mth) varying from 0.42 to 0.79. The 3D Reynolds Averaged Navier-Stokes (RANS) simulation is conducted with one-equation Spalart-Allmaras (S-A) turbulence model. The CFD simulation is validated with the experiment of AGARD test cases. The predicted total pressure recovery is in good agreement with experiment with the maximum discrepancy less than 1%. The distortion coefficient (DC60) is also in a reasonable agreement with the experiment. The simulation also agrees very well with the experiment for the wall static pressure distribution. For the CFJ S-duct, the horn shaped slot geometry is adopted for the CFJ injection and suction slots to minimize the flow separation caused by CFJ. For all the throat Mach numbers, the engine face distortion coefficient is reduced to less than 1%, virtually eliminated by CFJ. Besides, the total pressure recovery is also significantly enhanced, especially at the high throat Mach number of 0.79. The study also indicates that a higher throat Mach number requires a lower CFJ power coefficient (PC ) to eliminate the flow separation and distortion. This numerical study suggests that it is possible to eliminate S-duct distortion by using CFJ active flow control.

Original languageEnglish (US)
Title of host publicationAIAA Propulsion and Energy 2020 Forum
PublisherAmerican Institute of Aeronautics and Astronautics Inc, AIAA
Number of pages16
ISBN (Print)9781624106026
StatePublished - 2020
EventAIAA Propulsion and Energy 2020 Forum - Virtual, Online
Duration: Aug 24 2020Aug 28 2020

Publication series

NameAIAA Propulsion and Energy 2020 Forum


ConferenceAIAA Propulsion and Energy 2020 Forum
CityVirtual, Online

ASJC Scopus subject areas

  • Energy(all)
  • Aerospace Engineering
  • Control and Systems Engineering
  • Electrical and Electronic Engineering
  • Mechanical Engineering


Dive into the research topics of 'Distortion elimination for serpentine inlet using coflow jet flow control with variation of mach numbers'. Together they form a unique fingerprint.

Cite this