| 摘要: |
| 基于流动过程中的基本规律，参照液-液喷射器的尺寸设计方法，本文引入一组尺寸修正系数，通过实验确定最佳修正系数并提出喷射制冷循环中液气-液喷射器的设计方法。实验以R22为制冷工质，使用两相喷射器与满液式喷射器替代传统压缩制冷循环中的干式蒸发器以实现喷射制冷循环，采用Labview8.5进行实时数据采集。数据分析结果表明：喷射器的喷射系数在修正值δ=0.95时达到最高，此后处于下降趋势。喷射器在运行工况为工作压力0.95 MPa、引射压力0.45 MPa、混合压力0.5 MPa，修正系数δ=0.95时，各测点工况符合设计工况，且实验所得喷射系数均值与经验公式计算值误差小于3%，说明该尺寸设计方法具有可行性。 |
| 关键词: 喷射器 实验研究 两相流 设计方法 |
| DOI： |
| Received:April 07, 2017 |
| 基金项目: |
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| Size Design Method of Two-phase Ejector |
|
Du Yanjun, Liu Feng, Liu Yunfa, Zhang Bo
|
| (School of Energy and Power Engineering, Dalian University of Technology) |
| Abstract: |
| Based on the basic rules of the flow process, a set of dimensional correction coefficients is introduced according to the design method of the liquid–liquid ejector. The optimum correction coefficient is determined using an experimental verification method, and the design method of the liquid–liquid ejector in the jet refrigeration cycle is proposed. Experiments using R22 as a refrigerant, a two-phase ejector, and a full-liquid ejector replacing the dry evaporator in a traditional compression refrigeration cycle were conducted to achieve a jet refrigeration cycle. Labview8.5 was applied as the real-time data collector. Through a data analysis, it was found that the injection coefficient of the injector is the highest when the correction value is δ = 0.95, and then drops. When the operating conditions of the injector are a working pressure of 0.95 MPa, ejecting pressure of 0.45 MPa, mixing pressure of 0.5 MPa, and correction coefficient of δ = 0.95, the working conditions of each measuring point are in accordance with the design conditions, and the error between the measured value of the injection coefficient and the empirical formula is less than 3%, proving that the design method for this dimension is feasible. |
| Key words: ejector experimental investigation two-phase flow design method |
