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Lattice Boltzmann Simulation of Acoustic Oscillation in Thermoacoustic Resonant Tube

Author: DengYuZuo
Tutor: ZhangXiaoQing
School: Huazhong University of Science and Technology
Course: Refrigeration and Cryogenic Engineering
Keywords: Lattice Boltzmann Resonance tube Board stack Thermoacoustic refrigerator Oscillation
CLC: TB657
Type: Master's thesis
Year: 2009
Downloads: 56
Quote: 1
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Abstract


Thermoacoustic refrigerator is a new type of environmentally friendly refrigerator has many advantages , its application device has been widely studied . However, due to the thermoacoustic refrigerator operating in the nonlinear thermal acoustic coupling mechanism , the the multiscale effect and the structural environment of the porous medium , making thermoacoustic theory and numerical simulation has certain challenges , the urgent need to develop new methods of simulation analysis . The Lattice Gas thermoacoustic exploratory study of the Task Force , and has made ??some progress , this paper based on the lattice Boltzmann method to study the oscillation of the the thermoacoustic resonator in the medium and the heat transfer . First choose the lattice Boltzmann model for specific physical model of the thermoacoustic resonator (D2Q9 dual distribution of thermal lattice Boltzmann model ) to select a suitable lattice Boltzmann boundary processing format , and according to the physical boundary conditions , while the non- equilibrium extrapolation boundary approach is applied to the isothermal boundary . Secondly, the thermal lattice Boltzmann model the D2Q9 always double distribution numerical simulation of acoustic attenuation , verified by comparison with the analytical solution , the the selected lattice Boltzmann model reasonable . And oscillation characteristics of the medium piston driving after stabilization of the resonance tube , the driving frequency of the the medium oscillation density amplitude , the focus of the nonlinear phenomenon of the medium in oscillation in the resonance tube , and experimental results to be verified , the consistency of the simulation and experimental results proved the lattice Bolzmann be used to study the resonant tube medium oscillation problem . Finally, the resonance tube of the built - in plate stack , the phase difference and amplitude changes to analyze the impact of the plate stack of the impedance on the flow medium oscillation medium oscillating back and forth through the plate stack . The study shows that the plate stack of anti- medium oscillation resistance .

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