| 摘要 |
The purpose of the present invention is to provide a method for estimating exhaust gas recirculation of a helicopter by using the CFD capable of checking the applicability of a computational method by comparing the result of the computational result with the experimental values of an experimental method. To attain the purpose, the method for estimating exhaust gas recirculation of a helicopter by using the CFD according to the present invention comprises steps of: setting a computational analysis region for the computational analysis and a grid system on the computational analysis region (S100); performing the numerical analysis by applying a virtual blade module (VBM) method and a multi reference frame (MRF) method wherein the VBM method is to simulate the downward blow of the helicopter like in the airplane case, and the MRF method is to simulate a flow caused by the rotational movement of a main rotor hub and a link system (S200); estimating the temperature on the surface of the helicopter fuselage and a temperature rise at the air intake of the helicopter as compared with the atmospheric temperature based on the numerical analysis (S300); comparing the estimated result value, on the temperature on the surface of the helicopter fuselage and the temperature rise at the air intake of the helicopter, with a wind tunnel experiment result value (S400); and checking the effectivity of the computational analysis (S500). [Reference numerals] (AA,EE) Low speed;(BB,FF) High speed;(CC) Wind tunnel test result;(DD) Exhaust gas circulation increasing region;(GG) computational estimated value |
