SUPERSONIC NEAR FREE MOLECULE FLOW OVER A SPECULARLY REFLECTING FLAT PLATE WITH A DEFLECTED FLAP.
Abstract
The two-dimensional supersonic low-density flow over a flat plate with a deflected flap is analyzed both for free molecules and small collision frequency cases. Solutions for the expansion and compression flows over the corner, as well as the wake region, are given for the case of specular wall reflection. Numerical results are given for Mach numbers of 3, 6, and 12 for the free molecule macroscopic number density, velocity, and temperature. Additional solutions are given for the finite collision frequency case for a Mach number of 3 and a Knudsen number of 5. The solutions indicate the extent of the upstream influence regions and the downstream wake regions as a function of the product of flap angle and free stream Mach number for a given Knudsen number. Results for the lift/drag ratio and the lift curve slope of the plate-flap configuration are also given as a function of Knudsen number. On the basis of the above results, flap effectiveness over a range of Knudsen numbers in the low density regime is determined. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- May 01, 1966
- Accession Number
- AD0486943
Entities
People
- Charles R. Ortloff
Organizations
- The Aerospace Corporation