【摘要】：壓力旋流噴嘴被廣泛應用于航空發(fā)動機、船用發(fā)動機、車用汽油缸內直噴發(fā)動機、燃氣輪機等動力機械的燃油噴射系統(tǒng)中.以壓力旋流噴嘴射流為研究對象,開展了圓環(huán)旋轉黏性液體射流破碎液滴粒徑與速度數(shù)量密度分布相關性問題研究.對于液體射流,以往的研究往往對破碎液滴粒徑數(shù)量密度分布或速度數(shù)量密度分布進行單獨研究,對于這兩種數(shù)量密度分布之間關系的研究較少;從相關性的角度對圓環(huán)旋轉黏性液體射流破碎液滴粒徑與速度數(shù)量密度分布之間的關系進行研究.采用最大熵原理方法建立了圓環(huán)旋轉黏性液體射流破碎液滴粒徑與速度聯(lián)合概率密度函數(shù).對圓環(huán)旋轉黏性液體射流破碎液滴粒徑與速度聯(lián)合概率密度函數(shù)進行了討論,對圓環(huán)旋轉黏性液體射流破碎液滴粒徑數(shù)量密度分布與速度數(shù)量密度分布的相關性問題進行了研究.研究結果表明,為了給出正確的圓環(huán)旋轉黏性液體射流破碎液滴粒徑與速度聯(lián)合概率密度函數(shù),射流守恒約束條件中必須同時包括質量守恒定律、動量守恒定律以及能量守恒定律;破碎液滴粒徑的數(shù)量密度分布與速度數(shù)量密度分布密切相關;射流旋轉強度對破碎液滴粒徑數(shù)量密度與速度數(shù)量密度分布結構影響不大,對破碎液滴粒徑數(shù)量密度和速度數(shù)量密度的分布區(qū)域影響較大.
[Abstract]:Pressure swirl nozzles are widely used in the fuel injection systems of aero-engine, marine engine, gasoline cylinder direct injection engine, gas turbine and other power machinery of aero-engine, marine engine, automobile gasoline cylinder, gas turbine and so on. Taking the jet of the pressure swirl nozzle as the research object, the relationship between the particle size of the broken droplet and the velocity density distribution of the annular rotating viscous liquid jet was studied. For liquid jet, the quantitative density distribution or velocity quantitative density distribution of the particle size of broken droplets is usually studied separately in the past, but the relationship between these two quantitative density distributions is less studied. The relationship between particle size and velocity density distribution of annular rotating viscous liquid jet was studied from the correlation point of view. The joint probability density function of particle size and velocity of annular rotating viscous liquid jet was established by means of maximum entropy principle. The joint probability density function of particle size and velocity of annular rotating viscous liquid jet for breaking liquid droplets is discussed in this paper. The relationship between particle size density distribution and velocity density distribution of annular rotating viscous liquid jet was studied. The results show that in order to obtain the correct probability density function of particle size and velocity in annular rotating viscous liquid jet, the law of mass conservation must be included in the constraint condition of jet conservation. Momentum conservation law and energy conservation law; The quantitative density distribution of the particle size of broken droplets is closely related to the distribution of velocity quantitative density. The jet rotation intensity has little effect on the distribution structure of particle size density and velocity quantity density of broken droplets, but has a great influence on the distribution regions of particle size density and velocity quantitative density of broken droplets.
【作者單位】： 北京交通大學機械與電子控制工程學院;
【基金】：國家自然科學基金(51276001) 北京市自然科學基金(3132016) 中央高�；究蒲袠I(yè)務費專項基金(2016JBM049) 國家高技術研究發(fā)展計劃(2013AA065303)資助項目
【分類號】：O358

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