|Table of Contents|

Measurement method of nozzle atomization angle based on image processing(PDF)

《火箭推进》[ISSN:1672-9374/CN:CN 61-1436/V]

Issue:
2022年03期
Page:
63-70
Research Field:
研究与设计
Publishing date:

Info

Title:
Measurement method of nozzle atomization angle based on image processing
Author(s):
QIAN Chen1;  GAO Xinni2;  HU Baolin2;  PENG Zhongwei2;  YAN Hua1;  YANG Bin1
(1.Shanghai Key Laboratory of Multiphase Flow and HeatTransfer in Power Engineering, School of Energy and Power Engineering, University of Shanghai for Science and Technology, Shanghai 200093, China 2.Xian Aerospace Propulsion Institute, Xian 710100, China)
Keywords:
atomization angle deflection angle image processing threshold segmentation edge recognition measurement uncertainty
PACS:
V238
DOI:
-
Abstract:
Aiming at the measurement of nozzle atomization angle, the measurement method of nozzle atomization angle based on image processing is studied.A telecentric lens optical imaging measurement system is designed and built,and the image processing algorithm based on image gray threshold segmentation, edge recognition and angle analysis is studied.The atomization angle and deflection angle are obtained by processing the spray image.In order to verify the measurement accuracy of the system, the standard angle block is used for measurement.The maximum relative error of angle measurement is 1.01 and the measurement uncertainty is better than 0.10°.On this basis, this optical imaging measurement system is applied to the atomization angle test of A, B and C three types of nozzles.The results show that the method can effectively obtain clear images, and the atomization angle and deflection angle can be obtained by threshold segmentation and edge recognition algorithm.The measurement uncertainty of atomization angle for three typical single nozzles A, B and C is 0.806°, 0.279° and 0.624°,and the measurement uncertainty of deflection angle is 0.207°, 0.402° and 0.620°,respectively.The average measurement uncertainty of atomization angle for A, B and C nozzles is 0.659°, 0.427° and 1.291°, and the average measurement uncertainty of deflection angle is 0.389°, 0.231° and 0.487°, respectively.Therefore, the test method of nozzle atomization angle based on image processing can provide intuitive and effective basis for evaluating nozzle atomization performance.

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