| Item type |
紀要論文 / Departmental Bulletin Paper(1) |
| 公開日 |
2015-03-26 |
| タイトル |
|
|
タイトル |
Flow Coefficient of Injector |
|
言語 |
en |
| 言語 |
|
|
言語 |
eng |
| 資源タイプ |
|
|
資源タイプ識別子 |
http://purl.org/coar/resource_type/c_6501 |
|
資源タイプ |
departmental bulletin paper |
| その他のタイトル |
|
|
その他のタイトル |
噴射器の流量係数について |
| 著者 |
倉谷, 健治
橋本, 保成
小田, 欣司
KURATANI, Kenji
HASHIMOTO, Yasunari
ODA, Kinji
|
| 出版者 |
|
|
出版者 |
宇宙科学研究所 |
| 書誌情報 |
宇宙科学研究所報告
巻 18,
p. 1-24,
発行日 1984-03
|
| 抄録（英） |
|
|
内容記述タイプ |
Other |
|
内容記述 |
Flow coefficient of injector elements having almost the same dimension with the injectors used for the test firing of full scale liquid hydrogen-oxygen rocket engines was studied. In these flow tests, water is used in place of liquid oxygen and the flow coefficient is derived from Bernoulli's equation. However, the value obtained by this procedure is not an universal constant and affected considerably by the experimental conditions. So that, in the liquid flow system, pressure difference at the injector DPOi was normalized by the down-stream pressure PC and the non-dimensional ratio of DPOi/PC was introduced as an useful parameter to describe the change of the flow coefficient reflecting the flow experimental conditions. In the gaseous flow, Fanno's equation was applied to derive the flow coefficient and the experimental results was described as the function of Mach number. In the liquid flow, the flow coefficient Cd shows a maximum at the low ratio DPOi/PC and the variation of Cd against DPOi/PC near the maximum was characterized by the injector designes. The other remarkable point of the liquid flow is indicated by the abrupt change induced by the cavitating flow. Therefore, it is important to carry out the flow test at the high down-stream pressure and to keep appropriate DPOi/PC value to presume the actual flow observed in the engine firing. In the gaseous flow system, the flow coefficient Cf is obtained as the function of Mach number M, and Cf starts from the low value and reaches to the constant high value as the increase of M. The coefficient Cf to be observed in the engine firing is able to estimate from the flow tests carried out at the ordinary ambient pressure using room temperature guseous nitrogen in place of cold hydrogen gas so far as the matching of M is realized in both cases. That is, there is no substantial change with the variation of fluid temperature in the range from 100 to 300 K. The possibility of the interference between the simultaneous flows of oxidant and fuel, in other words, the acceleration or deceleration of flow by the flow of the another component is denied within the flow conditions encountered in the firing tests of full scale engines. |
| ISSN |
|
|
収録物識別子タイプ |
ISSN |
|
収録物識別子 |
0285-2853 |
| 書誌レコードID |
|
|
収録物識別子タイプ |
NCID |
|
収録物識別子 |
AN00354474 |
| 資料番号 |
|
|
内容記述タイプ |
Other |
|
内容記述 |
資料番号: SA0166024000 |
SA0166024.pdf (1.2 MB)
