The free-molecule flow characteristics of concave surfaces

Show simple item record

dc.creator Pratt, M. J. 2017-06-28T13:18:37Z 2017-06-28T13:18:37Z 1963-06 2022-05-09T10:07:11Z 2022-05-09T10:07:11Z
dc.description The problem of free molecule flow over concave surfaces is investigated, and general equations formulated for the lift, drag, and heat transfer characteristics of such surfaces. The effect of multiple reflections is taken into account by use of the Clausing integral equation to determine the redistribution of molecular flux over the surface. It is assumed that emission of molecules from the surface is purely diffuse, and that the reflected molecules are perfectly accommodated to the surface conditions. The equations obtained are solved for the cases of (i) an infinitely long circular cylindrical arc and (ii) a section of a spherical surface, at hyperthermal velocities. It is found that under the above conditions the local heat transfer characteristics are the same as those of the corresponding convex surface, the total heat transfer being independent of the geometry of the surface. As drag devices, the concave surfaces examined prove only slightly more effective than a flat plate at similar incidence, and as a generator of lift the cylindrically cambered plate is significantly inferior to the flat plate at similar incidence.
dc.language en
dc.publisher College of Aeronautics
dc.relation CoA/N-155
dc.relation 155
dc.title The free-molecule flow characteristics of concave surfaces
dc.type Report

Files in this item

Files Size Format View
COA_N_155_1963.pdf 3.499Mb application/pdf View/Open

This item appears in the following Collection(s)

Show simple item record



My Account