Wennerstrom and Puterbaugh (1984) presented a model for predicting the shock loss in a compressor blade row that took into account the three-dimemionality of the shock surface. Both the measured data and the numerical solution show that the shock surface is almost normal to the relative flow on each S_1 stream surface near the design flow condition. The shock surface is oblique in the spanwise direction because of the sweep of the Wennerstrom and Puterbaugh (1984) presented a model for predicting the shock loss in a compressor blade row that took into account the three-dimemionality of the shock surface. Both the measured data and the numerical solution show that the shock surface is almost normal to the relative flow on each S_1 stream surface near the design flow condition. The shock surface is oblique in the spanwise direction because of the sweep of the