Designers drafting valves, which are the most essential elements of high-speed compressors, are faced with many problems solving of which goes beyond the limit of theoretical considerations. Therefore it is necessary to carry on comprehensive and penetrating laboratory investigations within this field. Such investigations are an experimental verification of numerous calculation methods and computer simulation programs. Badly designed valves can be an origin of heavy energy losses. There are common structures of high-speed compressors, in which energy consumption necessary for overcoming the flow resistance through valves, ranges from 20-25% of indicated power [1,2,3,5,7].
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