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Numerical simulation of flow in Hartmann resonance tube and flow in ultrasonic gas atomizer

Applied Mathematics and Mechanics(English Edition) 2007年第11期28卷 1415-1426页

作者：李博胡国辉周哲玮 Shanghai University Shanghai Institute of Applied Mathematics and Mechanics

The gas flow in the Hartmann resonance tube is numerically investigated by the finite volume method based on the roe solver. The oscillation of the flow is studied with the presence of a needle actuator set along the nozzle axis. Numerical results agree well with the theoretical and experimental results available. Numerical results indicate that the resonance mode of the resonance tube will switch by means of removing or adding the actuator. The gas flow in the ultrasonic gas atomization （USGA） nozzle is also studied by the same numerical methods. Oscillation caused by the Hartmann resonance tube structure, coupled with a secondary resonator, in the USGA nozzle is investigated. Effects of the variation of parameters on the oscillation are studied. The mechanism of the transition of subsonic flow to supersonic flow in the USGA nozzle is also discussed based on numerical results.

关键词： Hartmann resonance tube spray atomization ultrasonic gas atomization,finite volume method roe solver

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Modeling and Simulation of Real Gas Flow in a Pipeline

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Journal of Applied Mathematics and Physics 2016年第8期4卷 1652-1681页

作者： Agegnehu Atena Tilahun Muche Department of Mathematics Savannah State University Savannah USA

In this paper, a mathematical model that describes the flow of gas in a pipe is formulated. The model is simplified by making some assumptions. It is considered that the natural gas flowing in a long horizontal pipe, no heat source occurs inside the volume, transfer of heat due to heat conduction is dominated by heat exchange with the surrounding. The flow equations are coupled with equation of state. Different types of equations of state, ranging from the simple Ideal gas law to the more complex equation of state Benedict Webb Rubin Starling (BWRS), are considered. The flow equations are solved numerically using the Godunov scheme with roe solver. Some numerical results are also presented.

关键词： Gas Flow Equation of State Godunov Scheme roe solver Pipe

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