Propeller engine matching optimization method suitable for long-endurance turboprop power unmanned aerial vehicle
An optimization method and long-endurance technology, applied to aircraft parts, power plant types, ground installations, etc., to achieve the effect of simplifying the selection process
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[0027] The three dimensionless parameters of the present invention to characterize the aerodynamic characteristics of the propeller are respectively the pull coefficient C T , power coefficient C P and advance than J:
[0028]
[0029]
[0030]
[0031] Among them, T is propeller thrust (pull force), P is engine output power, ρ is atmospheric density, n is propeller speed, D is propeller diameter, and V is flight speed.
[0032] The propeller aerodynamic characteristic data provided by the propeller manufacturer usually includes the propeller efficiency η corresponding to different power coefficients and forward ratios, that is, the propeller efficiency can be determined by the two dimensionless quantities of forward ratio and power coefficient. For each power coefficient, there is a corresponding advance ratio that maximizes propeller efficiency.
[0033] Taking the power input as the starting point, using the power coefficient and forward ratio, introducing a dime...
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