Research on the recovery characteristics evaluation of total temperature probe in the high-speed airflow
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TH81 V211. 71

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    Abstract:

    The total temperature measurement precision is a key index of the measurement and control system of the wind tunnel. The technical index requirement of total temperature measurement is up to 0. 1℃ , and the temperature measurement error with velocity is the main consideration of the index requirement. To achieve the reliable performance assessment of the total temperature probe and high precision compensation of the temperature measurement error with velocity, a total temperature probe with double stagnation cover is designed. The evaluation method of the recovery coefficient is proposed, and evaluation experiments are implemented in the pilot wind tunnel. Experimental results show that the total temperature probe with double stagnation hood is less disturbed by the flow field than the traditional total temperature probe. And the test performance is much more stable. The proposed method for the recovery coefficient could compensate the temperature measurement error due to the high-speed flow effectively. Compared with the current engineering method, the compensation accuracy of the proposed evaluation method for the traditional total temperature probe recovery coefficient is 8 times higher. The research results can be applied to the aerodynamics geoclimatic test facilities, which provide good fundaments for the progress of the measurement technology of the wind tunnel.

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  • Received:
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  • Online: June 28,2023
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