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contributor authorM. B. Flathers
contributor authorG. E. Baché
date accessioned2017-05-08T23:59:32Z
date available2017-05-08T23:59:32Z
date copyrightOctober, 1999
date issued1999
identifier issn1528-8919
identifier otherJETPEZ-26792#725_1.pdf
identifier urihttp://yetl.yabesh.ir/yetl/handle/yetl/122103
description abstractRadial loads and direction of a centrifugal gas compressor containing a high specific speed mixed flow impeller and a single tongue volute were determined both experimentally and computationally at both design and off-design conditions. The experimental methodology was developed in conjunction with a traditional ASME PTC-10 closed-loop test to determine radial load and direction. The experimental study is detailed in Part 1 of this paper (Moore and Flathers, 1998). The computational method employs a commercially available, fully three-dimensional viscous code to analyze the impeller and the volute interaction. An uncoupled scheme was initially used where the impeller and volute were analyzed as separate models using a common vaneless diffuser geometry. The two calculations were then repeated until the boundary conditions at a chosen location in the common vaneless diffuser were nearly the same. Subsequently, a coupled scheme was used where the entire stage geometry was analyzed in one calculation, thus eliminating the need for manual iteration of the two independent calculations. In addition to radial load and direction information, this computational procedure also provided aerodynamic stage performance. The effect of impeller front face and rear face cavities was also quantified. The paper will discuss computational procedures, including grid generation and boundary conditions, as well as comparisons of the various computational schemes to experiment. The results of this study will show the limitations and benefits of Computational Fluid Dynamics (CFD) for determination of radial load, direction, and aerodynamic stage performance.
publisherThe American Society of Mechanical Engineers (ASME)
titleAerodynamically Induced Radial Forces in a Centrifugal Gas Compressor: Part 2—Computational Investigation
typeJournal Paper
journal volume121
journal issue4
journal titleJournal of Engineering for Gas Turbines and Power
identifier doi10.1115/1.2818533
journal fristpage725
journal lastpage734
identifier eissn0742-4795
keywordsForce
keywordsGas compressors
keywordsStress
keywordsImpellers
keywordsComputational fluid dynamics
keywordsDesign
keywordsBoundary-value problems
keywordsGeometry
keywordsVaneless diffusers
keywordsComputational methods
keywordsMesh generation
keywordsCavities AND Flow (Dynamics)
treeJournal of Engineering for Gas Turbines and Power:;1999:;volume( 121 ):;issue: 004
contenttypeFulltext


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