An automatic simulation method of centrifugal pump cavitation performance based on CFD platform

Abstract

The invention discloses a method for automatically simulating the cavitation performance of a centrifugal pump based on a CFD platform. The model is divided into unstructured grids; 3) Import the grid file of the full flow channel calculation domain of the centrifugal pump into the CFX software, and set the definition file of the non-cavitation model; 4) Set the steam model on the basis of step 3). 5) Create a batch calculation file and execute Tools / Command line / perl*Enter on CFX software to realize automatic simulation of centrifugal pump cavitation performance. The invention ensures that the entire simulation process can realize continuous, automatic and accurate simulation of the cavitation performance of the centrifugal pump without manual intervention, effectively reduces the time wasted due to pauses in the simulation calculation process, and shortens the research and development cycle.

Description

technical field [0001] The invention relates to a method for simulating the cavitation performance of a hydraulic machine, in particular to an automatic simulation method for the cavitation performance of a centrifugal pump based on a CFD platform. Background technique [0002] Centrifugal pump is a kind of hydraulic machinery widely used in agricultural irrigation, urban water supply and other production and living sectors. In recent years, with the rapid development of infrastructure construction at home and abroad, the use of centrifugal pumps has also increased dramatically. However, due to long-term operation and harsh working environments, cavitation has become an efficient and stable centrifugal pump unit. major obstacle to operation. [0003] As we all know, the cavitation problem has always been a difficult point in the design of centrifugal pumps, and it has also been a research hotspot of domestic and foreign scientific research institutions and scholars. The cur...

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Problems solved by technology

Therefore, the traditional method requires manual repeated setting of multiple cavitation model files, and the simulation status is monitored at all times. Once the simulation calculation under the previous inlet pressure value converges and stops, the researchers cannot immediately update the calculation results under the previous pressure value. As an initial condition, when an imported pressure value file is calculated after manual startup, it will inevitably cause unnecessary waste of time and increase the development cycle and cost.

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