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Performance study of an inlet in supersonic flow

Soltani, M. R ; Sharif University of Technology | 2013

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  1. Type of Document: Article
  2. DOI: 10.1177/0954410011426672
  3. Publisher: 2013
  4. Abstract:
  5. The performance characteristics of an axisymmetric inlet at its design and off-design operational conditions are experimentally investigated. The model is tested for wide ranges of free stream Mach numbers, M∞ = 1.5-2.5, and mass flow rates. For each test, the pressure recovery, the mass flow passing through the inlet and the pressure distribution over the spike and the cowl are measured. In addition, the shock wave formed in front of the inlet is visualized. The characteristic curve of the inlet is then obtained for each free stream Mach number. As the Mach number is increased, the pressure recovery is reduced, but the maximum value of the mass flow rate grows up. Variations of the mass flow affect the surface pressure over both the front portion of the cowl and the entire surface of the spike. Further, it has changed both pressure and Mach number at the end of the diffuser, which would consequently affect the performance of the propulsion system. In addition, contrary to the internal boundary layer, the external one far from the cowl lip has been found to be almost independent of the inlet mass flow rate for a constant free stream Mach number
  6. Keywords:
  7. Boundary layer ; Influence of the mass flow rate ; Mach number effect ; Performance at off-design conditions ; Supersonic inlet ; Axisymmetric ; Characteristic curve ; Cowl lip ; Free stream mach numbers ; Internal Boundary layer ; Mass flow ; Mass flow rate ; Number effects ; Off design condition ; Operational conditions ; Performance characteristics ; Performance study ; Pressure recovery ; Propulsion system ; Supersonic inlets ; Surface pressures ; Boundary layers ; Design ; Mach number ; Mass transfer ; Pipe flow ; Aerodynamics
  8. Source: Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering ; Volume 227, Issue 1 , 2013 , Pages 159-174 ; 09544100 (ISSN)
  9. URL: http://pig.sagepub.com/content/early/2012/01/06/0954410011426672