Optimization of Geometric Parameters of the Rotor in the Turbine Flowmeter
Zhen Wang, Tao Zhang
Abstract:
A new method is presented in this paper for improving the linearity of the turbine flowmeter by optimizing the geometric parameters of the rotor. An objective function is defined to improve the linearity. Four characteristic parameters: the ratio of the blade tip space to pipeline radius, the ratio of the rotor hub radius to the blade tip radius, the fitted angle of the blade at the mean square root radius and the cascade solidity of the blade tip, are used to optimize the rotor design according to the n dimension extremum complex configuration optimization method and the turbine flowmeter’s mathematic model. The newly designed optimal rotors of 50mm and 25mm bore turbine flowmeter were manufactured and evaluated on a water flow calibration facility. The linearity of the optimized flowmeters is found to be 0.3657% and 0.283% respectively.
