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NASA-TM-73726
Two phase choke flow in tubes with very large L/D
Year: 1977
Abstract: Data were obtained for two phase and gaseous choked flow nitrogen in a long constant area duct of 16200 L/D with a diverging diffuser attached to the exit. Flow rate data were taken along five isotherms (reduced temperature of 0.81, 0.96, 1.06, 1.12, and 2.34) for reduced pressures to 3. The flow rate data were mapped in the usual manner using stagnation conditions at the inlet mixing chamber upstream of the entrance length. The results are predictable by a two phase homogeneous equilibrium choking flow model which includes wall friction. A simplified theory which in essence decouples the long tube region from the high acceleration choking region also appears to predict the data resonably well, but about 15 percent low.
Subject: DIFFUSERS
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| contributor author | NASA - National Aeronautics and Space Administration (NASA) | |
| date accessioned | 2017-09-04T16:44:09Z | |
| date available | 2017-09-04T16:44:09Z | |
| date copyright | 01/01/1977 | |
| date issued | 1977 | |
| identifier other | VWHOEEAAAAAAAAAA.pdf | |
| identifier uri | https://yse.yabesh.ir/std/handle/yse/107472 | |
| description abstract | Data were obtained for two phase and gaseous choked flow nitrogen in a long constant area duct of 16200 L/D with a diverging diffuser attached to the exit. Flow rate data were taken along five isotherms (reduced temperature of 0.81, 0.96, 1.06, 1.12, and 2.34) for reduced pressures to 3. The flow rate data were mapped in the usual manner using stagnation conditions at the inlet mixing chamber upstream of the entrance length. The results are predictable by a two phase homogeneous equilibrium choking flow model which includes wall friction. A simplified theory which in essence decouples the long tube region from the high acceleration choking region also appears to predict the data resonably well, but about 15 percent low. | |
| language | English | |
| title | NASA-TM-73726 | num |
| title | Two phase choke flow in tubes with very large L/D | en |
| type | standard | |
| page | 23 | |
| status | Active | |
| tree | NASA - National Aeronautics and Space Administration (NASA):;1977 | |
| contenttype | fulltext | |
| subject keywords | DIFFUSERS | |
| subject keywords | FLOW VELOCITY | |
| subject keywords | ISOTHERMS | |
| subject keywords | NITROGEN | |
| subject keywords | PIPE FLOW | |
| subject keywords | PRESSURE | |
| subject keywords | TWO PHASE FLOW |