Simulation of Installed-state Nozzle Outlet Probe Strength and Modal Analysis
Aiming at the problem that the existing simulation and test methods can't evaluate the influence of aerodynamic load and temperature load on the structural strength and natural frequency of the probe when the probe is installed,the flow-thermal-solid coupling method was proposed to study the structural strength and modal characteristics of the probe measured in the simulated installation state.Firstly,the CFD(computational fluid dynamics)simulation method was used to obtain the temperature and pressure distribution of the probe surface.The temperature data was imported into the Steady-state Thermal module for steady-state thermal analysis to obtain the probe temperature distribution.The aerodynamic load and temperature load were introduced into the static strength analysis module,and the thermal stress and static stress simulation were carried out,and the maximum deformation of the probe body is calculated to be 0.336 mm and the maximum stress of the probe body is 97.867 MPa.The measured probe modal analysis under pre-stress was carried out,and it is found that the natural frequencies of the first six orders are higher than the calculation results of the traditional method,and the natural frequency of the probe differs from the engine more than 10％,and the designed probe has been installed and used,the reliability of the calculation results is verified.
万方数据
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