Theory of Mutual Interference of Propeller Blades

Abstract

In the first part two dimensional potential flow round latticed wing is investigated and a new solution was arrived at. The second part is the application of the above theory to propeller. Under the supposition of plane cross section of propeller blades, the effect of mutual interference of blades upon thrust, torque and efficiency is discussed. The effect of interference has tendency to decrease all of them. The amount for thrust and torque hi almost same and hence the efficiency is almost unchanged. For large blade angles the interference is larger than otherwise.