Computer Simulation Of Rotary Impeller And Power Ultrasonic Compound Degassing Process For Aluminum Alloy

Currently, aluminum is the non-ferrous metal which were used most widely, andthere is a big demand for it, so a large amount of high quality aluminum alloy meltwould be required, especially the aluminum alloy products that were used in the fieldof aerospace, they must have higher quality. But currently it is difficult to achieve theideal cleaning effect by the single gas purification method, which can not meet therequirement of aerospace field. Therefore, this paper tried to simulate the process ofthe purification of aluminum alloy melt by rotary impeller and power ultrasoniccomposite degassing method.Firstly, this paper theoretically analyzed the degassing process of rotary impellerdegassing method and power ultrasonic degassing method respectively. The rotaryimpeller and power ultrasonic composite degassing process would be seen as thatpower ultrasonic degassing process is added to rotary impeller degassing process.The advantage of two methods composite degassing method than single rotaryimpeller degassing method would be proposed.Then, the rotary impeller degassing process was computer numerical simulated.By analyzing the basic distribution rule of the melt internal pressure field andvelocity field the under different rotational speed and gas flow rate contrastively, weknew that a single rotary impeller degassing method can not improve the degassingefficiency only by changing the process parameters.Finally, the composite degassing process was three-dimensional computernumerical simulated. By analyzing the basic distribution rule of the melt internalpressure field during the rotary impeller degassing process and composite degassingprocess contrastively, we knew that rotary impeller and power ultrasonic composite degassing method have an advantage over the single rotary impeller degassingmethod. By analyzing the basic distribution rule of the melt internal pressure fieldduring the composite degassing process under the different process parameterscontrastively, we knew that the longer rotary impeller and power ultrasonic workingtogether time is, the more fully the gas contact with the melt, and the more big theultrasonic amplitude is under the rotary impeller and power ultrasonic work together,the more beneficial it is to improve the bubbles distribution in the melt.