Investigation of Rotating Stall Phenomenon and Optimization in Mixed-Flow Waterjet Propulsion Device

Table 4

Results analysis.

Evaluation index		A	B	C	D
KQ	K1	0.3205	0.3194	0.3270	0.3196
	K2	0.3218	0.3227	0.3261	0.3227
	K3	0.3238	0.3267	0.3218	0.3266
	K4	0.3309	0.3283	0.3222	0.3282
	k1	0.0801	0.0798	0.0817	0.0799
	k2	0.0804	0.0807	0.0815	0.0807
	k3	0.0810	0.0817	0.0804	0.0816
	k4	0.0827	0.0821	0.0806	0.0821
	Range R	0.0026	0.0023	0.0013	0.0022
	Rank		A B D C
	Optimal scheme		A4B4D4C1
KHT	K1	0.2967	0.2964	0.2959	0.2973
	K2	0.2966	0.2965	0.2964	0.2966
	K3	0.2965	0.2959	0.2966	0.2957
	K4	0.2955	0.2964	0.2962	0.2956
	k1	0.0742	0.0741	0.0740	0.0743
	k2	0.0741	0.0741	0.0741	0.0741
	k3	0.0741	0.0740	0.0742	0.0739
	k4	0.0739	0.0741	0.0741	0.0739
	Range R	0.0003	0.0001	0.0002	0.0004
	Rank		D A C B
	Optimal scheme		D1A1C3B1 or D1A1C3B2 or D1A1C3B4
η (%)	K1	293.25	292.31	298.35	292.48
	K2	294.16	294.46	297.54	294.77
	K3	295.34	297.57	293.99	297.38
	K4	300.7	299.11	293.57	298.82
	k1	73.31	73.08	74.59	73.12
	k2	73.54	73.62	74.39	73.69
	k3	73.84	74.39	73.50	74.35
	k4	75.18	74.78	73.39	74.71
	Range R	1.87	1.70	1.20	1.59
	Rank		A B D C
	Optimal scheme		A4B4D4C1
FP-T (N·kW^−1)	K1	195.50	191.61	219.05	191.80
	K2	199.83	202.64	215.55	202.81
	K3	206.57	217.85	199.61	217.27
	K4	233.18	222.99	200.87	223.20
	k1	48.87	47.90	54.76	47.95
	k2	49.96	50.66	53.89	50.70
	k3	51.64	54.46	49.90	54.32
	k4	58.30	55.75	50.22	55.80
	Range R	9.43	7.85	4.86	7.85
	Rank		A B D C or A D B C
	Optimal scheme		A4B4D4C1 or A4D4B4C1