Blowing tests on typical structures of probes used in compressor tests
Focusing on probe measurement accuracy in compressor performance tests,blowing tests were carried out on typical structures of the total pressure probe(stagnation cap structure and ball hole structure)and the total temperature probe(single-shielded structure and double-shielded structure)used in compressor tests.The results show that the total pressure probe with a stagnation cap structure is superior to the probe with a ball hole structure in terms of airflow sensitivity angle,measurement accuracy,and measurement stability.The recovery characteristic of a single-shielded thermocouple total temperature probe is better than that of a double-shielded probe.The influence of thermal radiation error is small at low temperatures,and the double-shielded total temperature probe does not have significant advantages over the single-shielded probe in the measurement accuracy of total temperature.
compressortotal temperature probetotal pressure probeshielded structureblowing test
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