8.1� � � �

� � ͼ � � ʾ � � � � � � � � һ � � � � � � � � � � � ֡ � � Ӷ � � ֡ � � � � � � � � � � � � ϵ Ĵ � � � � � � � � � � � � � ɡ � � � ԭ � � � � � � � � � � � � � � � � ת � � ʱ � � � � � ڴ � � � � � � ֮ � � Ħ � � � � � � � � � a � � Ǵ Ӷ � � � � � һ � � ת � � � � � Ӷ � ʵ � � � ˶ � � Ķ � � � � Ĵ � � ݡ �

8.1.1 � � � � � � � � � � � �

1. � � � � � � ԭ � � �

1 � � � � Ħ � � � � � � � � � � � � � � � � � � � � ּ � � Ħ � � � � ʵ � ִ � � � � � � � n � � � � � � � � ƽ � � � � � � � ȣ �

� � 2 � � � � � ϴ � � � � � � � � � � ڲ � ͹ � � � � � � � � � Ե � ϵ awesome ݲ � � � � � � � ʵ � ִ � � � � � � � ͬ � � � � � � � � � �

2. � � � � ; � �

1 � � � � � � � � � � � � � ݶ � � � � �

� � 2 � � � � � ʹ � � � � � � � Ʒ � a � � � � 1/2 level � � � � ۴ � � � � � � �

3. � � � � � � � � � Ľ � � � � � ״ � �

1 � � � � ƽ � � ƽ � � � Ľ � � � � � ״ Ϊ � � � Σ � � ڱ � � � Ϊ � � � � �

V � � � 2 � � � � � � � � � � � ״ Ϊ � � � Σ � � � � � � � Ϊ � � � � � � �

3 � � � � � � Ш � � � � � � � � � � ƽ � � � � � � � � � ɶ � � n � � � � ɵ Ĵ � � � � � � � � ɴ � � ݺ ܴ � Ĺ � � ʡ �

� �

4 � � � � Բ � delta � � � � � � � � Ϊ Բ � Ρ � ֻ � � � � С � � � ʴ � � � � �

5 � � � � � � � the delta � � � ͬ � � � � � � � �

8.1.2 � � � � � � � � � ص � � Ӧ � �

� ص 㣺� � � � � � � � � � � � � Դ � � � � � � � � � ƽ � ȣ � � � � � С � � � ɻ � � � � � � � � � ʱ � � � � � � � ڴ � � � � ϴ � � � � � � � � � � � � � � � � � � � � � � � � � � a � � � � � � � � � � � ϴ � � � � � ľ ࣬ � ṹ � � � � � 졢 � � װ � � ά � � � Ϸ � � 㣬 � ҳ ɱ � � � � � � � � � � � � ڴ � � � � � � ֮ � � � � ڻ � � � � � � � � � � � � ϸ ֲ � � 䡣 � � � � � � � Ĵ � � � Ч � ʽ ϵ ͣ � � � � � � � � � һ � � ϶ ̣ � � � � � � � � � ȼ � ױ � � � � � � creates � � � � �
һ � � � � � � £� � � � � � � � � � � � Ĺ � � � � P 100 kw � � � � � � � v = 5 to 25 m/s � � ƽ � � � � � � � � I � � 5 � � � � � � Ч � � Ϊ 94% 97% � � ͬ � � � � � the delta � � Ĵ � � � Ϊ 40 to 50 m/s � � � � � � � � I � � 10 � � � � � ݹ � � ʿ ɴ � 200 kw, Ч � ʸ ߴ 98% - 99% � � �

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