此报告根据动量叶素理论对各个不同展向截面的弦长和扭角进行计算,按比例画出弦长、扭角随叶高的分布。根据以上计算结果手工制作风力机叶片,这是风能专业的必修课程。
张果宇，冯卫民，刘长陆，俞剑锋 ，风力发电机叶片设计与气动性能仿真研究，能源研究与利用 , Energy Research & Utilization,2009年 01期
Design of a Tapered and Twisted Blade for the NREL Combined Experiment Rotor March 1998 – March 1999 P. Giguère and M.S. Selig Department of Aeronautical and Astronautical Engineering University of Illinois at Urbana-Champaign Urbana, Illinois
附录
1. 程序： #include<stdio.h> #include<math.h> #define R 4.93178098 #define W 7.536 main() {double
a,b,a1,b1,a2,b2,f,f1,f2,h1,h2,h3,x,Cl,Cd,d[9]={0.15,0.2,0.3,0.4,0.5,0.6,0.7,0.8,0.9},Cn,Ct,c[9]={1.342046647,1.111705033,0.807237743,0.626191466,0.509242815,0.428268274,0.369147425,0.324190452,0.288899091}; int i; Cl=0.7227; Cd=0.01593; for(i=0;i<9;i++) {a2=b2=0; do {a1=a2; b1=b2;
x=atan((1-a1)*7.0/(1+b1)/W/d[i]/R);