Experiments and Numerical Simulation of Performances and Internal Flow for High-Speed Rescue Pump with Variable Speeds

Table 1

Main parameters of original high speed rescue pump.

Structure	Parameter		Value
Impeller	Hub diameter	/mm	65
	Inlet diameter of impeller	/mm	125
	Outlet diameter of impeller	/mm	248
	Outlet blade angle of impeller	/°	32
	Outlet width of impeller	/mm	15
	Wrap angle	/°	135
	Blade number of impeller		7
Diffuser vane	Base diameter of diffuser	/mm	253
	Outer diameter of diffuser	/mm	360
	Outlet diameter of diffuser	/mm	310
	Inlet angle of diffuser	/°	11.4
	Throat height of diffuser	/mm	22
	Outlet height of diffuser	/mm	30
	Blade number of diffuser		9