A cold-flow experimental observation of the two-stage impinging type injector for rocket propulsion

Berlin Huang, Tony Yuan, Yu Ta Chen, Yu Hsiang Su

研究成果: Conference contribution

1 引文 斯高帕斯(Scopus)

摘要

Green (low toxicity) liquid rocket propellants have become attractive in recent years due to the features of the low cost and less environmental impact. However, the green propellants, such as kerosene/H2O2, usually have different operational conditions (i.e. relatively high O/F ratio) compared to conventional propellants because of their chemical properties. In this research, a new concept of the two-stage impinging type injector (O-F-F-O) is adopted for investigating the spray mixing at high O/F ratios between 3.75 and 6.25. The impinging distance, jet velocity and impinging angle for the two-stage impinging type injector are design parameters examined, where the impinging angle is more effective at spray atomization and droplet distribution. The PLIF technique is used to measure the droplet distribution so as to identify the spray characteristics. In order to simplify the development process of the injector, the predicted mixture ratio distribution from the individual fuel (F-F) and oxidizer (O-O) sprays by overlapping their averaged images is used to compare with the actual distribution from the two-stage impinging spray (O-F-F-O). At a constant total mass flow rate, results indicate that tendencies towards the variations of the average characteristic velocity (C*) with increasing O/F ratios are similar for outcomes of the prediction and actual measurement. Also, there is obvious flow fields interaction between the fuel and oxidizer sprays and coordinating their relative intensities of sprays well can optimize the mixture ratio distribution of the two-stage impinging spray. Better mixing occurs when the fuel and oxidizer sprays have more similar and uniform distributions.

原文English
主出版物標題51st AIAA/SAE/ASEE Joint Propulsion Conference
發行者American Institute of Aeronautics and Astronautics Inc, AIAA
ISBN(列印)9781624103216
DOIs
出版狀態Published - 2015
事件51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015 - Orlando, United States
持續時間: 2015 七月 272015 七月 29

出版系列

名字51st AIAA/SAE/ASEE Joint Propulsion Conference

Other

Other51st AIAA/SAE/ASEE Joint Propulsion Conference, 2015
國家United States
城市Orlando
期間15-07-2715-07-29

All Science Journal Classification (ASJC) codes

  • Engineering(all)

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