A detachable, measurable, and photographable teaching/research dual-purpose model designed specifically for the courses of Fluid Mechanics, Pumps and Pumping Stations, and Fluid Machinery in universities and research institutions. Students can complete experiments, internal flow field photography, and performance curve drawing within 30 minutes without the need for additional pumping or complex debugging. Detachable optical compensation box reduces refractive error during PIV shooting. Enable students to "see" abstract concepts such as impeller inlet and outlet velocity triangles, Euler equations, and cavitation allowances in real-time in the textbook formulas. Support flipped classroom and PBL teaching: Students can independently design experimental plans, 3D print modified impellers, and cultivate innovative abilities.