实验流体力学2012，Vol.26Issue(3)：45-49,5.
低背鳍对细长平板三角翼分离涡稳定性影响的研究
Effects of low dorsal fin on the stability of vortex flow over slender delta wing
摘要
Abstract
A vortex stability theory for slender conical bodies which was proposed by the professors of NWPU was reviewed and used to analyze the asymmetric vortices characteristics of a flat-plate delta wing and its combinations. To verify the validity of the theoretical predictions and show the force development versus angle of attack, a wind tunnel test was conducted on a flat-plate delta wing of 82. 5 degrees sweep angle and its combinations using a six-component internal strain-gage balance. The angles of attack is at 12°～32° and sideslip within ±10°. Two fins of different heights were tested. The ratios of the local fin height to the local wing semi-span were 0. 3 and 0. 6 respectively. The Reynolds number is 1. 66 million. The measurement of the aerodynamic forces and moments clearly indicates that no lateral force occurs over wing-alone model at lower angles, but a steady force-asymmetry occurs over the wing-fin models at certain angles. The experimental results and the theoretical results are in good agreement qualitatively, it provides force measurement evidence of the validity of the vortex stability theory preliminarily.关键词
涡的稳定性/大迎角空气动力学/背鳍/细长体/平板三角翼Key words
vortex stability/ high angle of attack aerodynamics/ fin/ slender body/ flat-plate delta wing分类
航空航天引用本文复制引用
孟宣市,蔡晋生,罗时钧,刘锋..低背鳍对细长平板三角翼分离涡稳定性影响的研究[J].实验流体力学,2012,26(3):45-49,5.基金项目
国家自然科学基金(51107101) （51107101）
高等学校博士学科点基金(20096102120001) （20096102120001）
西北工业工业大学基础研究基金(JC201218) （JC201218）
