摘要
针对某民用飞机辅助动力装置(APU),采用数值模拟方法研究了5~45 kt(9.26~83.34 km/h)地面尾风条件下,进气旋流畸变指数和进气总压恢复系数的变化规律,并在25节地面尾风条件下开展试验对进气旋流畸变指数和进气总压恢复系数的变化规律进行了对比验证,数值模拟与试验吻合较好。研究结果表明:在地面尾风条件下,进气旋流畸变指数绝对值与APU负载呈弱正相关,进气总压恢复系数与APU负载呈负相关,APU高负载工况可以表征全APU负载范围内的最严酷情况;地面尾风会加剧负向进气旋流畸变和进气总压损失,地面尾风风速越大,进气旋流畸变指数绝对值越大,进气总压恢复系数越小,但均存在较大裕度,地面尾风非APU进气的严酷工况。
Based on a civil auxiliary power unit(APU),numerical simulation was carried out to investigate the variations of inlet swirl distortion index and inlet total pressure recovery coefficient under ground tailwind conditions from 5 to 45 kt(9.26—83.34 km/h).On-aircraft test was also conducted under 25 knot ground tailwind condition for comparison and verification,which showed good mutual agreement.The investigation indicated that:under ground tailwind conditions,the absolute value of inlet swirl distortion index showed a weak positive correlation with APU load,while the inlet total pressure recovery coefficient showed a negative correlation with APU load,the high APU load operational conditions can represent the most severe conditions among entire APU load range;ground tailwind exacerbated inlet swirl distortion of negative direction and total pressure loss,higher ground tailwind velocity led to higher absolute value of inlet swirl distortion index and lower total pressure recovery coefficient;however,both parameters had sufficient margins,indicating that ground tailwind is not a severe condition for APU inlet.
作者
张子松
吕金华
蓝天
王晗
张强
ZHANG Zisong;LYU Jinhua;LAN Tian;WANG Han;ZHANG Qiang(Shanghai Aircraft Design and Research Institute,Commercial Aircraft Corporation of China,Limited,Shanghai 201210,China)
出处
《航空动力学报》
2026年第3期119-128,共10页
Journal of Aerospace Power
关键词
适航
地面尾风
辅助动力装置
进气旋流畸变指数
进气总压恢复系数
airworthiness
ground tailwind
auxiliary power unit
inlet swirl distortion index
inlet total pressure recovery coefficient
