The invention discloses a full-working condition
performance prediction method for a compressor, and aims at providing a rapid and accurate full-working condition aerodynamic
performance prediction method so as to increase the design and optimization efficiency of the compressor. In the method, a formula is established by taking parameters of a design point as the reference to predict the flow, the efficiency and the
overall pressure ratio of an off-design working condition; in a flow prediction method, firstly, the flow of the design point is converted according to an
empirical formula to flow corresponding to a peak efficiency point at different rotating speeds, and then, blocking flow and surging flow at respective rotating speeds are calculated; in an efficiency prediction method, firstly, the efficiency of the design point is converted according to the
empirical formula to peak efficiency at different rotating speeds, and then, the efficiency at different rotating speeds is calculated according to an elliptic piecewise approximation method; and in a prediction method for the
overall pressure ratio, work factors at different rotating speeds and different flow are calculated according to the thought of the
equivalent width of an
impeller exit, and the work factors are combined with current efficiency to obtain the
overall pressure ratio. By applying the full-working condition
performance prediction method to design and optimization of the compressor, the
design cycle can be remarkably shortened, and the design cost is reduced.