Propulsion performance and operability are key factors in the development of a successful aircraft. For high-speed supersonic aircraft, mixed-compression inlets offer high performance but are susceptible to an instability referred to as unstart. An unstart occurs when a disturbance originating in the atmosphere or the engine causes the shock system to be expelled from the inlet. This event can have adverse effects on control of the aircraft, which is unacceptable for a passenger plane such as the high speed civil transport (HSCT). The ability to predict the transient response of such inlets to flow perturbations is, therefore, important to the proper design of the inlet and the control measures used to prevent unstart. Computational fluid dynamics (CFD) is having an increasing role in the analysis of individual propulsion components. isolated inlet studies are relatively easy to perform, but a major uncertainty is the boundary condition used at the inlet exit to represent the engine - the so-called compressor face boundary condition. A one-dimensional (I-D) Euler inlet simulation (ref. 1) showed that the predicted inlet unstart tolerance to free-stream pressure perturbations can vary by as much as a factor of about six, depending on the boundary condition used. Obviously, a thorough understanding of dynamic interactions between inlets and compressors/fans is required to provide the proper boundary condition.


    Access

    Access via TIB

    Check availability in my library


    Export, share and cite



    Title :

    Inlet-Compressor Analysis Using Coupled CFD Codes


    Contributors:

    Publication date :

    1998-01-01


    Type of media :

    Miscellaneous


    Type of material :

    No indication


    Language :

    English




    Inlet-Compressor Analysis using Coupled CFD Codes

    Cole, Gary / Suresh, Ambady / Townsend, Scott | NTRS | 1999


    Analysis of Inlet-Compressor Acoustic Interactions Using Coupled CFD Codes

    Suresh, A. / Townsend, S. E. / Cole, G. L. et al. | British Library Conference Proceedings | 1999


    Inlet-Compressor Analysis Performed Using Coupled Computational Fluid Dynamics Codes

    Cole, Gary L. / Suresh, Ambady / Townsend, Scott | NTRS | 1999


    Analysis of inlet-compressor acoustic interactions using coupled CFD codes

    Suresh, A. / Townsend, S. / Cole, G. et al. | AIAA | 1999


    Nacelle and compressor inlet arrangements

    SCHWARZ FREDERICK M / MALECKI ROBERT E | European Patent Office | 2018

    Free access