Design of total temperature and total pressure combined sensor
Because the general total temperature sensor usually has large volume and single function,it is not able to be well suitable for the small aircraft,so a kind of small combined total temperature and total pressure sensor was designed.In the sensor,the appearance structure,stagnation hood,sealing structure were specially designed,and a kind of total temperature and total pressure sensitive component was designed which used the Glass Sintering Process to solve the key technologies of high temperature resistance,sealing and insulation performance.The flow field of the sensor and the influence of the total pressure pipe on the internal flow field are simulated by Fluent.Design of the sensor is improved based on the simulation results.The wind tunnel calibration shows that the total temperature recovery coefficient of the sensor is≥0.970 in the range of Ma=0.3 to Ma=0.9.Under the condition of Ma=0.3(altitude H=0),the time constant of the sensor is less than 0.9 s.Under 1 MPa pressure,the pressure drop within 1 min is not exceed 300 Pa.The total pressure error is better than±0.02 in the range of Ma=0.3 to Ma=1.0.It achieved the requirements of the aircraft and reached higher technical indicators.
total temperaturetotal pressuresensitive componentstagnation hoodtotal temperature recover coefficienttime constant
万方数据
维普
