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首页> 美国政府科技报告 >Effect of Discrete Spanwise Regions of Bleed on Pseudo-Two Dimensional Base Flow at Transonic Speeds
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Effect of Discrete Spanwise Regions of Bleed on Pseudo-Two Dimensional Base Flow at Transonic Speeds

机译：跨流速离散区域对跨声速下伪二维基流的影响

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A preliminary experimental study of a new type of pseudo-two-dimensional bluff base consisting of a series of rectangular prismatic protrusions spaced along the span with base bleed into the regions between the protrusions is presented. A base geometry was derived which had less drag at subsonic and transonic speeds than the best reported non-bleed arrangement for bleed mass flow coefficients (based on the mass flux swept by the model frontal area) in the range 0.02 to 0.04. A simple two-dimensional bleed arrangement requires a bleed coefficient greater than 0.08 to achieve the same subsonic base drag.

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