Abstract
Carbon-fiber reinforced polymer material impeller is designed for the centrifugal pump to deliver corrosive, toxic, and abrasive media in the chemical and pharmaceutical industries. The pressure-velocity coupling fields in the pump are obtained from the CFD simulation. The stress distribution of the impeller couple caused by the flow water pressure and rotation centrifugal force of the blade is analyzed using one-way fluid-solid coupling method. Results show that the strength of the impeller can meet the requirement of the centrifugal pumps, and the largest stress occurred around the blades root on a pressure side of blade surface. Due to the existence of stress concentration at the blades root, the fatigue limit of the impeller would be reduced greatly. In the further structure optimal design, the blade root should be strengthened.
Highlights
In the development of pumps for the corrosive, toxic, and abrasive liquids, it is important to choose suitable highstrength, corrosion resistant materials for the parts in contact with the liquids
The carbon-fiber reinforced polymers (CFRP) impeller as a key component of centrifugal pump is analyzed using one-way fluid-solid coupling method with the purpose of estimating the strength of the impeller
The long and short blades composite CFRP impeller is designed according to orthogonal method [6, 7] and numerical simulation
Summary
In the development of pumps for the corrosive, toxic, and abrasive liquids, it is important to choose suitable highstrength, corrosion resistant materials for the parts in contact with the liquids. Even the use of high-alloy steels and alloys does not always provide the necessary safe and smooth operation of the pumps under the conditions of the chemical and other industries. The plastic and plastic-lined pumps were developed to deliver such media due to their high chemical corrosion resistance [2], whereas the plastic is not suitable for the cases of higher stress. The most promising material is the fiber reinforced polymer composite. Carbon-fiber reinforced polymers (CFRP) are distinguished from other structural plastics by their combination of low density, high modulus of elasticity, high fatigue strength, thermal stability, low friction coefficient, and high wear resistance [3]. The CFRP impeller as a key component of centrifugal pump is analyzed using one-way fluid-solid coupling method with the purpose of estimating the strength of the impeller
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