Study Effects of the Rotor Profile on the Leakage and the Intertooth Area
Date Issued
2007
Date
2007
Author(s)
Hung, Tse-Yuan
Abstract
Rotor profiles of screw rotor compressors affect the leakage and the intertooth area of screw rotor compressors. Decreasing the length of the action line and the blow hole area and increasing the intertooth area improve the rotor profile. The length of action line, the intertooth area or the blow hole can be used to evaluate the rotor profile. his study proposes a mathematical model to study basic characteristics of the length of the action line, the blow hole area and the intertooth area for the rotor profiles of a twin-screw rotor compressor. Based on the given action line of the SRM-C profile, the Hermite function is used for the curve fit of the action line. Then, utilizing the genetic algorithm with selection of some specific points on the action line, the intertooth area is used as an object function and the length of the action line and the blow hole area are used as constraints. By changing the locations of these specific points, a new action line and, thereafter, new rotor profiles can be obtained. The optimum length of the action line, the blow hole area and the intertooth area of the basic characteristics can be obtained and compared with those of the SRM-C profile.he length of the action line of the proposed compressor is 0.35% shorter, the blow hole area is 1.71% smaller and the intertooth area is 2.10% greater than those of the SRM-C profile.
Subjects
screw rotor compressor
rotor profiles
action line
intertooth area
blow hole area
genetic algorithm
Type
thesis
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ntu-96-R92522619-1.pdf
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