The influences of variable sectional area design on improving the hydrocarbon fuel flow distribution in parallel channels under supercritical pressure
| Autor: | Wenli Yu, Khaled Chetehouna, Yuguang Jiang, Jiang Qin, Yaxing Xu, Wen Bao, Nicolas Gascoin, Silong Zhang |
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| Rok vydání: | 2018 |
| Předmět: |
Pressure drop
Materials science 020209 energy General Chemical Engineering Organic Chemistry Flow (psychology) Energy Engineering and Power Technology 02 engineering and technology Mechanics 021001 nanoscience & nanotechnology Cooling capacity Physics::Fluid Dynamics Fuel Technology Heat flux Heat transfer 0202 electrical engineering electronic engineering information engineering Scramjet Boundary value problem 0210 nano-technology Computer Science::Information Theory Communication channel |
| Zdroj: | Fuel. 233:442-453 |
| ISSN: | 0016-2361 |
| DOI: | 10.1016/j.fuel.2018.06.082 |
| Popis: | To help solve flow mal-distribution and cooling capacity utilization problems in parallel cooling channels of SCRamjet, the variable channel sectional area design is put forward. 3D modelling of the flow and heat transfer in multiple parallel channels is carried out under supercritical pressure. The flow distribution reasonability and cooling effect under different channel sectional area designs are numerically compared and analyzed. The analysis indicates the variable channel sectional area design improves the flow distribution reasonability obviously and lowers the wall temperature. Furthermore, the variable channel sectional area design adapts to different heat flux boundary conditions. Even in the flow mal-distribution problems caused by both inlet/outlet headers and non-uniform thermal boundary, the variable cross section area design works well because the ratio of channel pressure drop which is insensitive to the heating is increased. The fuel cooling capacity utilization is also refined. |
| Databáze: | OpenAIRE |
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