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FEATURE: CFD Modeling of an Internal Rotary Pump

	Posted Wed November 14, 2001 @06:18PM
	Rob Broberg of AEA Technology has provided us with his analysis of an internal rotary pump (a type of gear pump). The pump studied is an example of a special class of internal rotary pump which utilizes cycloidal gear profiles. This means that the gear profile is generated by rolling, without slippage, a circle around a larger fixed circle. Usually the outer gear, or trochoid, is generated in this fashion and the inner gear is the conjugate shape to the outer gear. This leads to the term generated-rotor or gerotor pump. This analysis is quite advanced in that it is transient and involves moving mesh. The article includes a number of animated images which serve to greatly enhance understanding of the flow field. You can find this article, and more, in the features section.

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