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| 1 | 入口顶部二次风对PV型旋风分离器性能的影响显示文摘提出一种进气口顶部、分离器顶板之下的新型二次风引入口,通过数值模拟和实验考察该二次风对PV型旋风分离器性能的影响。结果表明:引入该二次风后,分离器内气流切向速度增大,上行轴向速度和径向速度减小;二次风可有效抑制顶灰环产生,减小升气管短路流的粉尘量;引入进气口顶部二次风后,分离器的最大效率增加约2%,压降最大减少16.8%;总处理气量增加、压降减小,显示出明显的高效低阻特征。 | 周发戚 孙国刚 王青莲 魏庆 | 2018 | 中国粉体技术2018，24，1： | 3 |
| 2 | Estimation of the Radial Distribution of the Tangential Velocity in a Vortex Chamber显示文摘The estimation of maximum tangential velocity becomes a very important factor for the estimation of performancesof the vortex chamber. In this paper, a proposed flow model of how to estimate the maximum tangential velocity inthe special form of the vortex chamber is described in detail. The pressure drop basing upon the rapid expansion byflowing from the inlet pipe into the cyclone body is estimated as half of the dynamic pressure in the inlet pipe. | Akira OGAWA Tsuyoshi IKARI Hiroyuki MURAKAMI Kouhei SATHO | 2009 | Journal of Thermal Science2009，18，1： | 1 |
| 3 | Estimations of the Maximum Tangential Velocity V_(θm) in the Vortex Core Region and also the Mean Rotational Velocity V_(oi) near the Concave Wall Surface in the Returned Flow Type Cyclone Dust Collector显示文摘There are many types of cyclone dust collectors for separating the fine solid and dust particles from gases in the various industries and also in the home used purposes. For estimating the power loss and the collection efficiency, one of the most important factors is the maximum tangential velocity Vθm in the vortex core region in the cyclone body. In order to determine Vθm by the simple method, it is useful to apply the mechanical balance of the angular momentum fluxes under the assumption of Ogawa combined vortex model which is composed of the quasi-forced vortex in the vortex core region and also the quasi-free vortex surrounded the vortex core region and also under the assumption of the introduction of equivalent length Heq corresponding to the cone spaces of the cyclone body and the dust bunker. On the other hand, the mean rotational velocity Voi near the concave wall surface is also estimated by the mechanical balance of angular momentum fluxes with the moment of viscous friction force. For confirming the general applications of the obtained equations, the returned flow types cyclones changed the throat diameter D3 are designed. The material of the cyclone is the transparent acrylic resin. Therefore the inner surface of the cyclone body can be regarded as smooth surface. The comparisons of the measured velocities Vθm and Voi by a cylindrical Pitot tube are shown in good agreement with those of the proposed equations. The above stated results are described in detail. | Akira Ogawa | 2010 | Journal of Thermal Science2010，19，6： | 0 |
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