Preliminary Determination of Propeller Aerodynamic Characteristics for Small Aeroplanes

Acta Polytechnica

S. Slavík¹ 

关键词: propeller;    propeller aerodynamics;    thrust coefficient;    power coefficient;    propeller efficiency;    propeller design;   

DOI  :  

来源: Czech Technical University in Prague, Faculty of M

【 摘 要 】

This paper deals with preliminary determination of propeller thrust and power coefficients depending on the advance ratio by means of some representative geometric parameters of the blade at a specific radius: propeller blade chord and blade angle setting at 70 % of the top radius, airfoil thickness at the radius near the tip and the position of the maximum blade width. A rough estimation of the non-linear influence of propeller blades number is included.The published method is based on Lock`s model of the characteristic section and the Bull-Bennett lift and drag propeller blade curves. Lock`s integral decomposition factors and the loss factor were modified by the evolution of the experimental propeller characteristics. The numerical-obtained factors were smoothed and expressed in the form of analytical functions depending on the geometric propeller blade parameters and the advance ratio.

【 授权许可】

Unknown