アスペクト比の小さい翼列の性能

第1報 翼のスパン中央における性能

抄録

Performances of the compressor type cascade of blades with small aspect ratio AR were experimentally obtained at the center of blade span. All blades had same span of 50mm and their aspect ratio were 2.08, 1.39, 1.04 and 0.83. Stagger angle (α) was changed from 0° to 60° and attack angle (α_i) from 0° to 15°. Results indicate that total pressure loss coefficient takes a minimum value at AR_??_1 irresspectively of α and α_i. At α_i over about 5° turning angle (ε) increases and at α_i=0° it decreases gradually with increasing AR. Axial velocity ratio, in the case α=0°, decreases gradually with incresing AR, and in the case α=30° it keeps almost constant value irrespectively of AR at α_i=constant, but in cases α=50° and 60° it increases at α_i≥5-10° with increasing AR.