Self-Induced Flow in a Stepped Rotating Tube
| Autor: | S. Gilham, Paul C. Ivey, J. M. Owen |
|---|---|
| Rok vydání: | 1992 |
| Předmět: |
Flow visualization
Materials science Mechanical Engineering Energy Engineering and Power Technology Aerospace Engineering Reynolds number Laminar flow Mechanics Isothermal process Jet engine law.invention symbols.namesake Fuel Technology Nuclear Energy and Engineering law Fluid dynamics symbols Simulation |
| Zdroj: | Journal of Engineering for Gas Turbines and Power. 114:268-274 |
| ISSN: | 1528-8919 0742-4795 |
| DOI: | 10.1115/1.2906583 |
| Popis: | Self-induced flow occurs when a tube, open at one end and sealed at the other, is rotated about its central axis: fluid flows along the axis from the open end towards the sealed end and returns in a layer adjacent to the inner surface of the tube. This mechanism, which can occur under isothermal or nonisothermal conditions, is believed to be responsible for the so-called “hot-poker effect” that was observed during anti-icing tests on the nose bullet of an aeroengine. This paper describes a combined theoretical and experimental study of self-induced flow. It is shown that, for the length-to-diameter (L/D) ratios and rotational Reynolds numbers associated with the anti-icing tubes of aeroengines, the laminar flow near the sealed end of the tube is similar to that of the so-called free disc. Swirl in the air outside the open end reduces the self-induced flow, but flow can reach the sealed end of a stepped tube which has either a sudden contraction or a sudden enlargement. |
| Databáze: | OpenAIRE |
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