Discharge coefficient of small sonic nozzles
| Autor: | Ming Lou, Jin-Long Meng, Dong-Sheng Li, Zhao-Qin Yin |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2014 |
| Předmět: |
Materials science
Renewable Energy Sustainability and the Environment lcsh:Mechanical engineering and machinery Flow (psychology) Nozzle discharge coefficient Mechanics small sonic nozzle Boundary layer thickness Discharge coefficient Diffuser (thermodynamics) Venturi effect Flow coefficient lcsh:TJ1-1570 Choked flow |
| Zdroj: | Thermal Science, Vol 18, Iss 5, Pp 1505-1510 (2014) |
| ISSN: | 0354-9836 |
| Popis: | The purpose of this investigation is to understand flow characteristics in mini/micro sonic nozzles, in order to precisely measure and control miniscule flowrates. Experimental and numerical simulation methods have been used to study critical flow Venturi nozzles. The results show that the nozzle?s size and shape influence gas flow characteristics which leading the boundary layer thickness to change, and then impact on the discharge coefficient. With the diameter of sonic nozzle throat decreasing, the discharge coefficient reduces. The maximum discharge coefficient exits in the condition of the inlet surface radius being double the throat diameter. The longer the diffuser section, the smaller the discharge coefficient becomes. Diffuser angle affects the discharge coefficient slightly. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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