78010-1978

The lift achievable by aerofoils having a particular form of supercritical upper-surface pressure distribution that yields only small wave drag.


 

 

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标准号
78010-1978
发布日期
1978年05月01日
实施日期
2004年05月14日
废止日期
中国标准分类号
/
国际标准分类号
/
发布单位
ESDU - Engineering Sciences Data Unit
引用标准
35
适用范围
ESDU 78010 gives charts of lift coefficient as a function of Mach number and thickness/chord ratio for a family of aerofoils having a particular form of supercritical upper-surface pressure distribution obtained by adding a local Mach number increment to the flat roof-top portion of pressure distribution used for the aerofoils of ESDU 71019. The charts give realistic design targets for drag-rise Mach number@ lift coefficient at drag rise and thickness/chord ratio as well as providing exchange rates between those quantities. The chordwise station (coincidental with shock location) at which pressure recovery to the trailing-edge begins is treated as a variable. Thresholds corresponding to the onset of rear separation@ attributable to the pressure rise from the shock-upstream location to the trailing edge@ are predicted by a modified form of Stratford's criterion.




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