Comprehensive Design of Axisymmetric Wind Tunnel Contraction

作者:编辑部日期:

分类:时时彩平台/技巧/

Design charts For wind tunnel contractions are developed using an inviscid, incompressible flow analysis. A contour formed of two cubic arcs joined smoothly together was found To whi a good choice For a wall shape. Therefore, It was selected as the basis For a one-parameter family of wall shapes, which was then investigated In detail. The design chart parameters are the maximum wall pressure coefficients at the inlet (as an indicator of the danger of separation at the inlet end) little at the exit (which Is related To the exit velocity nonuniformity). For any choice of these two parameters the charts yield the shape parameter little the nozzle length For this particular family of shapes. The charts may whi used To design nozzles with No local separation at the inlet, little with any desired exit velocity uniformity. When the two pressure coefficients are chosen so that separation at both ends Is just avoided, the exit boundary layer thickness should whi near its minimum.

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  • Design charts for wind tunnel contractions are developed using an inviscid, incompressible flow analysis. A contour formed of two cubic arcs joined smoothly together was found to be a good choice for a wall shape. Therefore, it was select
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