Abstract:This article introduces a method for measuring practical and accurate space bowl vanes’. Firstly, survey each relevant dimension of bowl as per sample, and draw the outline drawing, then remove the outer casing, while remaining one to two vanes to draw contour lines, survey radius dimensions from each point of vane’s interior and exterior streamline at the contour lines to centre line, to draw the bowl’s section passing centre line’s projection drawing. Following step is to draw a vertical section passing bowl’s axis at the left side of vane’s working surface, this section is to intersect with bowl’s inner casing’s outer surface and survey the chord dimension from each point of interior and exterior streamline at one side of the vanes to each intersection point between the vertical section and bowl’s inner casing’s outer surface, and takes the use of triangular function’s computing method to get every coordinate on the streamline at one side of the vane’s working surface, on the basis of this, to draw the expanded view of vane’s inner and outer streamlines. Finally, to survey vane’s each points’ circumference thickness S u, and draw the back side’s streamline. In this way, we have surveyed a lot bowl samples, after samples’ sending and customer’s testing , all performance are qualified and won our customer’s approval.