Multiobjective Optimization of Low-Specific-Speed Multistage Pumps by Using Matrix Analysis and CFD Method

Table 9

Range analysis of orthogonal test data.

Index	A	B	C	D	E	F	G	H	I	J
H/m
k 1	34.977	34.401	33.862	34.625	35.784	35.473	35.281	35.366	35.412	35.087
k 2	35.627	35.355	35.831	36.045	35.295	35.252	35.447	35.656	35.434	36.535
k 3	35.513	36.362	36.424	35.447	35.038	35.393	35.389	35.096	35.271	34.495
s	0.650	1.961	2.562	1.420	0.746	0.221	0.167	0.560	0.163	2.040
η/%
k 1	60.795	60.935	61.059	61.116	60.630	60.739	60.285	60.530	60.678	60.600
k 2	60.661	60.838	60.754	60.965	60.747	60.755	60.920	60.897	60.713	61.795
k 3	60.571	60.254	60.214	59.946	60.650	60.532	60.822	60.601	60.636	59.632
s	0.224	0.681	0.844	1.170	0.117	0.223	0.635	0.367	0.077	2.163
P/kW
k 1	1.963	1.927	1.855	1.936	2.033	2.027	2.009	2.015	2.017	2.018
k 2	2.033	2.007	2.045	2.053	2.017	2.000	2.008	2.022	2.031	2.025
k 3	2.038	2.101	2.134	2.045	1.985	2.007	2.017	1.998	1.987	1.992
s	0.075	0.174	0.279	0.116	0.048	0.027	0.009	0.024	0.043	0.033