Research on Multiobjective Optimization of Bulb Tubular Turbine Based on Orthogonal Test

Table 3

Grid number and unit efficiency.

Case	Cell numbers	Efficiency/%
1	4.4 million	88.9
2	4.8 million	89.7
3	5.2 million	90.2
4	5.6 million	90.8
5	6.0 million	90.9