In this Element, the gas-particle flow problem is formulated with momentum and thermal slip that introduces two relaxation times. Starting from acoustical propagation in a medium in equilibrium, the relaxation-wave equation in airfoil coordinates is derived though a Galilean transformation for uniform flow. Steady planar small perturbation supersonic flow is studied in detail according to Whitham's higher-order waves. The signals owing to wall boundary conditions are damped along the frozen-Mach wave, and are both damped and diffusive along an effective-intermediate Mach wave and diffusive along the equilibrium Mach wave where the bulk of the disturbance propagates. The surface pressure coefficient is obtained exactly for small-disturbance theory, but it is considerably simplified for the small particle-to-gas mass loading approximation, equivalent to a simple-wave approximation. Other relaxation-wave problems are discussed. Martian dust-storm properties in terms of gas-particle flow parameters are estimated.
- ISBN:
- 9781108964883
- 9781108964883
-
Category:
- Aerospace & aviation technology
- Format:
- Paperback
- Publication Date:
-
07-10-2021
- Publisher:
- Cambridge University Press
- Country of origin:
- United Kingdom
- Pages:
- 75
- Dimensions (mm):
- 228x152x5mm
- Weight:
- 0.13kg
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