Cavitation evaluation method for correcting flow coefficient by combining impulse method and weighing method

By combining the impulse method and weighing method, the flow coefficient is corrected and the cavitation degree parameters in the nozzle are calculated, which solves the problem that the prior art cannot evaluate the cavitation in the nozzle hole of the porous injector, and achieves a more accurate evaluation of the injection characteristic parameters , improves testing accuracy and engineering application value.

CN119102954APending Publication Date: 2024-12-10WUXI SAIHYDRIN NEW ENERGY TECHNOLOGY CO LTD
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Patent Information

Application Number
CN202411289400.9
Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
Filing Date
2024-09-14
Publication Date
2024-12-10

AI Technical Summary

Technical Problem

The existing injection characteristic testing methods cannot accurately evaluate the cavitation in each injection hole of the porous injector, and the impulse method cannot consider the cavitation phenomenon in the injector nozzle, resulting in the inability to obtain accurate flow coefficients and injection characteristic parameters.

Method used

Combining the impulse method and weighing method, by correcting the flow coefficient, calculating the cavitation degree parameters in the nozzle, evaluating the cavitation situation in the nozzle, including the cavitation area coefficient and velocity coefficient in the nozzle, using the Bernoulli equation and mass With the law of conservation of momentum, combined with direct measurement method and integral processing, the steady-state spray impulse and fuel injection rate are obtained.

Benefits of technology

It provides a method to evaluate the cavitation in each nozzle hole of a real pore injector, obtain more accurate injection characteristic parameters, solve the problem of cavitation overlooked in impulse method testing, improve the test accuracy, and has a wide range of engineering application value.

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Abstract

The invention discloses a cavitation evaluation method for correcting a flow coefficient by combining an impulse method and a weighing method, and relates to the field of power engineering. According to the cavitation assessment method for correcting the flow coefficient by combining the impulse method and the weighing method, the cavitation degree parameter I can be provided to assess the fuel flow cavitation degree in the nozzle, so that the cavitation condition in each spray hole of a real porous ejector can be assessed, and the problems that cavitation is neglected in the current impulse method test, and the test efficiency is low are effectively solved. The area coefficient is regarded as 1; meanwhile, through correction of the method, the cavitation area coefficient # imgabs0 # and the cavitation velocity coefficient # imgabs1 # which are closer to the flow condition in an actual injector nozzle can be obtained, more accurate injection characteristic parameters are obtained, and the method has wide engineering application value and application prospects.
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Citation Information

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