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Abstract: A
new method is proposed for extrapolating characteristic maps of
multistage axial flow compressors based on an introduction of
infinitesimal stage. With comparison from conventional Reynolds
extrapolation method, the proposed method divides air-polytropic process
into infinitesimal stage. Consequently, the condition required by
Reynolds analogy (RA) is satisfied perfectly for the infinitesimal
stage’s approximation to RA premises. With this idea the entire
characteristic map of compressor can be reconstructed by the combination
of infinite-stage characteristic maps. Validation efforts show the discussed
method has higher precision and fewer errors to simulate compressor
operating process. This work contributes to the improvement of
calculation characteristic maps of axial flow compressors.
Key words: Thermodynamic system Characteristic maps Similarity extrapolation Axial flow compressors
CLC No: TK472+6
国家自然科学基金资助项目(5997022). Received 20051102,
received in revised form 20060516
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