Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle

The fuel injector is an important component of the diesel engine. It has a great influence on the atomization of diesel fuel injection, the formation of mixed gas, and combustion emissions. Due to the current nozzle structure, processing level, and the internal hydraulic conditions of each nozzle, t...

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Autores principales:	Hua Xia, Fuqiang Luo, Zhong Wang
Formato:	article
Lenguaje:	EN
Publicado:	Hindawi Limited 2021
Materias:	Engineering (General). Civil engineering (General) TA1-2040 Mathematics QA1-939
Acceso en línea:	https://doaj.org/article/a79a1cc0bf44403f83254c5fa7977be0
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spelling	oai:doaj.org-article:a79a1cc0bf44403f83254c5fa7977be02021-11-29T00:56:50ZExperimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle1563-514710.1155/2021/2393799https://doaj.org/article/a79a1cc0bf44403f83254c5fa7977be02021-01-01T00:00:00Zhttp://dx.doi.org/10.1155/2021/2393799https://doaj.org/toc/1563-5147The fuel injector is an important component of the diesel engine. It has a great influence on the atomization of diesel fuel injection, the formation of mixed gas, and combustion emissions. Due to the current nozzle structure, processing level, and the internal hydraulic conditions of each nozzle, there are certain differences between the injection rules of each hole, and there are few methods to quantify the quality of the injector using mathematical methods in engineering. Based on the principle of spray momentum, this paper measures the injection characteristics of each hole of four five-hole pressureless chamber injectors of the same model and analyzes the circulating fuel injection volume and flow coefficient of each injector and each hole under different working conditions. It is proposed to evaluate the quality of the injector with the average circulating fuel injection volume, average flow coefficient, and nonuniformity as indicators. The test results are as follows: there are differences in the circulating fuel injection volume and flow coefficient between each hole of the same fuel injector. With the increase of the fuel injection pump speed, the average circulating fuel injection volume of each hole differs by 2.8%–47.5%, and the average flow coefficient differs by 3.7%–30%; as the fuel injection volume increases, the average circulating fuel injection volume of each injector differs 1.8%–36%, and the average flow coefficient difference is 2.5%–28.7%. The circulating fuel injection volume and flow coefficient of different fuel injectors of the same model are different. With the increase of the fuel injection pump speed, the average circulating fuel injection volume of each injector differs by 3.5%–9.6%, and the average flow coefficient differs by 1.4%–5.7%; as the fuel injection volume increases, the average circulating fuel injection volume of each injector differs 0.3%–5.5%, and the average flow coefficient difference is 2.8–4.2%. The relative flow coefficient of each hole differs from 0 to 0.02, and the nonuniformity differs from 1.8% to 16.9%. The relative circulating fuel injection amount of each hole differs from 0.02 to 0.1, and the nonuniformity differs from 1.1% to 6.9%. The relative flow coefficient of each hole and its nonuniformity is smaller than the relative circulating fuel injection volume of each hole and its nonuniformity.Hua XiaFuqiang LuoZhong WangHindawi LimitedarticleEngineering (General). Civil engineering (General)TA1-2040MathematicsQA1-939ENMathematical Problems in Engineering, Vol 2021 (2021)
institution	DOAJ
collection	DOAJ
language	EN
topic	Engineering (General). Civil engineering (General) TA1-2040 Mathematics QA1-939
spellingShingle	Engineering (General). Civil engineering (General) TA1-2040 Mathematics QA1-939 Hua Xia Fuqiang Luo Zhong Wang Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle
description	The fuel injector is an important component of the diesel engine. It has a great influence on the atomization of diesel fuel injection, the formation of mixed gas, and combustion emissions. Due to the current nozzle structure, processing level, and the internal hydraulic conditions of each nozzle, there are certain differences between the injection rules of each hole, and there are few methods to quantify the quality of the injector using mathematical methods in engineering. Based on the principle of spray momentum, this paper measures the injection characteristics of each hole of four five-hole pressureless chamber injectors of the same model and analyzes the circulating fuel injection volume and flow coefficient of each injector and each hole under different working conditions. It is proposed to evaluate the quality of the injector with the average circulating fuel injection volume, average flow coefficient, and nonuniformity as indicators. The test results are as follows: there are differences in the circulating fuel injection volume and flow coefficient between each hole of the same fuel injector. With the increase of the fuel injection pump speed, the average circulating fuel injection volume of each hole differs by 2.8%–47.5%, and the average flow coefficient differs by 3.7%–30%; as the fuel injection volume increases, the average circulating fuel injection volume of each injector differs 1.8%–36%, and the average flow coefficient difference is 2.5%–28.7%. The circulating fuel injection volume and flow coefficient of different fuel injectors of the same model are different. With the increase of the fuel injection pump speed, the average circulating fuel injection volume of each injector differs by 3.5%–9.6%, and the average flow coefficient differs by 1.4%–5.7%; as the fuel injection volume increases, the average circulating fuel injection volume of each injector differs 0.3%–5.5%, and the average flow coefficient difference is 2.8–4.2%. The relative flow coefficient of each hole differs from 0 to 0.02, and the nonuniformity differs from 1.8% to 16.9%. The relative circulating fuel injection amount of each hole differs from 0.02 to 0.1, and the nonuniformity differs from 1.1% to 6.9%. The relative flow coefficient of each hole and its nonuniformity is smaller than the relative circulating fuel injection volume of each hole and its nonuniformity.
format	article
author	Hua Xia Fuqiang Luo Zhong Wang
author_facet	Hua Xia Fuqiang Luo Zhong Wang
author_sort	Hua Xia
title	Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle
title_short	Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle
title_full	Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle
title_fullStr	Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle
title_full_unstemmed	Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle
title_sort	experimental research on the measurement of high-pressure microflow based on momentum principle
publisher	Hindawi Limited
publishDate	2021
url	https://doaj.org/article/a79a1cc0bf44403f83254c5fa7977be0
work_keys_str_mv	AT huaxia experimentalresearchonthemeasurementofhighpressuremicroflowbasedonmomentumprinciple AT fuqiangluo experimentalresearchonthemeasurementofhighpressuremicroflowbasedonmomentumprinciple AT zhongwang experimentalresearchonthemeasurementofhighpressuremicroflowbasedonmomentumprinciple
_version_	1718407666014879744

Experimental Research on the Measurement of High-Pressure Microflow Based on Momentum Principle

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