Volume 32 Issue 1
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Effect of transport properties of high-temperature air on boundary layer stability and transition prediction[J]. Journal of Aerospace Power, 2017, 32(1): 188-195. doi: 10.13224/j.cnki.jasp.2017.01.025
Citation: Effect of transport properties of high-temperature air on boundary layer stability and transition prediction[J]. Journal of Aerospace Power, 2017, 32(1): 188-195. doi: 10.13224/j.cnki.jasp.2017.01.025

Effect of transport properties of high-temperature air on boundary layer stability and transition prediction

doi: 10.13224/j.cnki.jasp.2017.01.025
  • Received Date: 2015-05-06
  • Publish Date: 2017-01-28
  • In order to study the effect of viscosity and thermal conductivity coefficient on the basic flow and flow stability in the boundary layer, the calculation model of the viscosity and thermal conductivity coefficient of high temperature gases was established by comparing Sutherland formula and Gupta fitting relation. Then Sutherland formula and the established model were applied to the 7species air model for chemical equilibrium flow respectively, and these models were compared in flatplate boundary layer of Mach number 10, 16 and 20 at the flight height of 30-5km. The calculation result shows that, within the high temperature range, the viscosity and thermal conductivity coefficient both affect basic flow, flow stability and transition prediction. The increase of viscosity can raise the disturbance growth rate, broaden the growth zone and advance the transition location, whereas the increase of thermal conductivity coefficient leads to opposite results.

     

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