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Acta Armamentarii ›› 2018, Vol. 39 ›› Issue (6): 1125-1131.doi: 10.3969/j.issn.1000-1093.2018.06.012

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Hydraulic Measurement Method for Equivalent Diameter of Laval Nozzle Throat

ZHANG Xiang1, SUN Xiao-hong2, PAN Xu-dong1, WANG Guang-lin1   

  1. (1.School of Mechatronics Engineering, Harbin Institute of Technology,Harbin 150001, Heilongjiang, China;2.CNC Machining Division, Aerosun Corporation, Nanjing 210006, Jiangsu, China)
  • Received:2017-10-08 Revised:2017-10-08 Online:2018-07-29

Abstract: The requirements of Laval nozzle size are quite strict, and the existing measurement methods can not be used to measure the equivalent diameter of Laval nozzle throat directly. A hydraulic measurement method for measuring the equivalent diameter of Laval nozzle throat based on the core plug gauge is proposed through the analysis of the orifice flow of the throat’s equivalent diameter measurement model. The relationships among the plug gauge size, orifice flow model and its relative sensitivity are analyzed. On this basis, the short orifice flow model is taken as the model for measuring the equivalent diameter of throat. The measurement parameters are determined, and a measurement prototype device is developed. The repeatability error of the proposed measurement method is ±0.001 8 mm. Key

Key words: Lavalnozzle, equivalentdiameter, corepluggauge, hydraulicmeasurement

CLC Number: