The quality evaluation of aero-thermal flowfield in 0.75 m×0.50 m icing wind tunnel
The quality of aero-thermal flowfield of the icing wind tunnel is the precondition for its experimental ap-plication.In order to evaluate the quality of the aerodynamic flowfield and the thermodynamic flowfield of 0.75 m×0.50 m icing wind tunnel,the compliance calibration test of the aerodynamic flowfield and thermal flowfield of the 0.75 m×0.50 m icing wind tunnel is carried out according to the SAE ARP 5905 icing wind tunnel standard,the quality of the aerodynamic flowfield,air flow angularity and thermodynamic flowfield of the center section of the test section are investigated,and the airflow velocity correction relationship and airflow temperature correction rela-tionship of the test section are obtained.The results show that the maximum deviation of aerodynamic flowfield is less than±2%,and the uniformity of aerodynamic flowfield is improved with the increase of airspeeds.The maxi-mum deviation of air flow angularity is less than 0.8°.While the airflow total temperature is within-20℃,the spa-tial uniformity can reach±1℃,and when the airflow total temperature is-30℃,the spatial uniformity can reach±2℃.The quality of aero-thermal flowfield of the 0.75 m×0.50 m icing wind tunnel meets the requirement of SAE ARP 5905 under the main test conditions.
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