问题
问答题 简答题
如何根据风轮机的额定功率、设计风速、高速特性曲线、风场风能密度设计风轮机的转速和风轮直径？
答案
参考答案：
按最佳风能利用系数设计，取相应的叶片。
（1）由图查得对应λopt的风能利用系数Cp
（2）计算风轮半径：
（3）计算风轮直径：D=2r
（4）计算风轮机转速：
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如何根据风轮机的额定功率、设计风速、高速特性曲线、风场风能密度设计风轮机的转速和风轮直径？
参考答案：
按最佳风能利用系数设计，取相应的叶片。
（1）由图查得对应λopt的风能利用系数Cp
（2）计算风轮半径：
（3）计算风轮直径：D=2r
（4）计算风轮机转速：
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| An old man lived alone in a town. He wanted to dig up his potato garden, but it was very 1 work. His only son, who always 2 him in the past, was then in prison (监狱). So the old man wrote a letter to his son and said: Dear Son, I am feeling pretty bad because it looks like I won't be able to 3 potatoes in my garden this year. I 4 to miss doing it, because your mother always loved planting time. I'm just getting too old to dig up a garden. If you were here, all my 5 would be over. I know you would dig up the garden for me 6 you weren't in prison. Love, Dad Soon the old man 7 a letter:" Dad, don't dig up the garden! That's where I buried (埋藏) the guns (枪)!" At 4 a.m. the next morning, some 8 came and dug up the whole garden without finding any guns. The old man was 9 and wrote another note to his son. He told him what had happened, and 10 him what to do next. His son's reply was: "Go ahead and plant your potatoes, Dad. It's the best I could do for you from here." | ||||
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