Full-working condition performance prediction method for compressor
A technology of performance prediction and prediction method, applied in the direction of engine function, mechanical equipment, machine/engine, etc., can solve the problems of large workload of coefficient calibration, poor prediction accuracy and poor versatility
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[0128] Embodiment: The full working condition aerodynamic performance prediction process of a certain turbocharger compressor from Tianjin North Engine Research Institute is as follows:
[0129] (1) Given the total inlet temperature of the compressor T t1 =298k, total inlet pressure p t1 =100000pa, specific heat ratio γ=1.4, gas constant R=287J / (kg·k). Given the geometric parameters of the compressor impeller, including: blade outlet installation angle β 2A =15deg, the number of blades Z=18, the meridional inclination of the impeller outlet θ 2 =85deg, blade outlet thickness t 2 =0.0007m, impeller outlet diameter D 2 =0.118m, the rate of change in the installation angle of the impeller outlet blade ξ=11rad / m.
[0130] (2) The parameters of a given design point, including: design machine Mach number M u2,d =1.2321, the highest design speed efficiency η p,d =0.7740, the mass flow rate at the highest efficiency point of design speed The total pressure ratio ε at the high...
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