关键词: 旋轮;流向测量;探头;研制

Abstract: This paper introduces the development of a designed five-hole probe of 3 mm in diameter which is shaped in a prismoid with a square cross section. The probe can reliably satisfy the requirement of quantitatively measuring the parameters of three-dimensional swirl flow for engineering application. The measurable flow angles are up to 30°. By using the fourth order polynomials to fit the calibration data set, the standard deviation of flow angles is controlled under 0.3° and the relative deviation of total pressure and dynamic pressure under 1.2%.It was fonud that when Math numbers are within 0.3-0.6 and flow angles within 0°-±30°,all the calibration pressure coefficients are independent from Mach numbers. This result of discovery can be used as reference to greatly save the expenses of wind tunnel tests.

Key words: Swirl;Flow directional detection;Probe;Development