Free-space oscillating pressures near the tips of rotating propellers

摘要: The theory is given for calculating the free-space oscillating pressures associated with a rotating propeller, at any point in space. Because of its complexity this analysis convenient only use critical region near propeller tips where assumptions used by Gutin to simplify his final equations are not valid. Good agreement was found between analytical and experimental results tip Mach number range 0.45 two, three, four, five, six, on eight-blade propellers clearances from 0.04 0.30 times diameter. If power coefficient, number, clearance known designer may determine these charts average maximum pressure plane rotation. A section report devoted fuselage response indicates some factors be considered solving problems vibration noise.