气液两相内混式油喷嘴混合室内压力特性的实验研究

以压缩空气和变压器油为工质，对气液两相内混式油喷嘴混合室内压力特性进行了实验研究．研究结果表明，对于结构已确定的油喷嘴，影响混合室内压力的运行因素主要是油压（p1)，气压（p2)及两者差值（p1-p2)．实验测得了相同雾化气压下不同油压时混合室内压力的变化值，并利用数理统计的方法，整理出了这种油喷嘴混合室内压力随油压变化的关系式．从统计关系式及实验数据相关线图的比较可以看出，两者的变化关系是非线性的．实验还测得了在相同油压条件下不同雾化气压时，混合室内压力随气压的变化值，整理出了混合室内压力随气压变化的关系式．从统计规律及实验数据相关线图分析比较看出，两者的关系近似为线性关系。

Experimental study on pressure characteristic in the mixing chamber of gas-liquid two-phase internal-mixing oil nozzle

Using constrictive air and transformer oil as working substances an experimental study is made on pressure characteristic in the mixing chamber of gas-liquid two phase internal -mixing-oil-nozzle in the paper. The result of the research shows that, the main operation factors on the pressure characteristic in the mixing chamber are the oil pressure (p1), the gas pressure (p2), and the difference between these two pressures (p1 - p2) according to the given oil nozzles. In traditional design and calculation for internal-mixing nozzle, the mixing-chamber pressure is regarded as the product of atomizing medium pressure (p2) and critical pressure ratio(b ) of this atomizing medium in some references. But from the experiment it can be seen that the pressure in the mixing-chamber is not equal to p2b, due to that the critical pressure ratio cannot be reached in practical operation. Therefore, the pressure data obtained by this method should be corrected to meet the case of error existence. The relations about pressure character in the mixing chamber of the gas-liquid two-phase internal-mixing nozzle gained in the paper can provide reference for theoretical study and design on the gas-liquid two-phase discharge characteristics of this kind of nozzles.