【正文】 Mechanism1. IntroductionThe vibrating fluidized bed (VFB) has been applied mercially to various processes, such as heat exchange, particle processing and chemical reaction, etc. The mechanical vibration imposed on a fluidized bed can significantly improve gas–solid contact and transport characteristics. It can be operated at a lower gas velocity and pressure drop pared to a conventional fluidized bed. The empirical relationships of fluidization characteristics with operation parameters and particle properties in an VFB have been reported in many papers for various applications. Recently, fluidization of fine particles has bee more attractive in particle processing and chemical reaction. Due to a large particle–particle interaction, fine particles are difficult to fluidize. Extra vibration energy is required to overe the adhesion force between particles for the improvement of fluidization behavior. It is, therefore, essential to understand the energy transfer mechanism in the bed for proper operation or design of an VFB. The efficient transfer of mechanical energy in an VFB is essential in a practical application. Nevertheless, few papers have reported on the mechanism of vibration in the fluidized bed. In a vibrated bed, a collision model of vibration energy transfer has been proposed while assuming an inpressible gas flow through a rigid particle bed. Later, the collision model was improved by considering the gas to be pressible. Based on that, the collision model was developed with new mathematical treatment to predict the collision state between the vibrating base and the particle bed at different vibration accelerations, and this model was found to be consistent with experimental results. The mechanism of transmission of vibrating energy was considered to be such that the vibration body collides with the particles near the bottom and wall, and then these particles collide with the next particles, leading to the transmission of kinetic energy through the bed. Since considerable dissipation of particle kinetic energy occurs in any inelastic collision process, the penetration depth of the vibration energy into the bed is quite limited. Goldshtein et al. observed a pression (shock) and expansion wave caused by vibration across the vibrated bed at a low frequency and large amplitude (f20 Hz, A10 mm) in a shallow bed. It was elucidated that the pression and expansion wave propagating across the bed balanced the loss of particle kinetic energy by inelastic collision. These waves govern the kinetic energy balance and sustain the collision hydrodynamic state of the vibrating bed. Yamazaki et al. observed that the large acceleration of mechanical vibration (g) causes pulsated gas flow through the bed at a low frequency (10–25 Hz) in an VFB, leading to pressure fluctuation in the VFB. The amplitude of the pressure fluctuation was affected by gas velocity, vibration frequency and vibration amplitude. Foscolo and Giblaro studied the transfer criteria of particulate and aggregate fluidization while considering the interaction force imparted on a particle by the surrounding fluid as a function of voidage. The motion of voidage fluctuation was taken as wave propagation in the fluidized bed. The wave propagation is affected by particles and fluid properties. The fluidization behavior can be evaluated from the wave growth rate. Wang et al. have reported that the energy transfer in a particle bed is mainly by collision before the bed is fluidized, but by wave propagation after the bed is fluidized. The shear forces of the vibration wave reduce the bubble size along the bed height. In this study, the mechanism of vibration energy transfer in a VFB was studied. The propagation of a pressure w。 Pressure wave。還有陳良，劉陽等同學(xué)，在我做論文期間給了我不少的幫助，在他們的支持幫助下，我在規(guī)定的時間內(nèi)完成了設(shè)計任務(wù)，在此向他們表示誠摯的感謝！ 52 東北大學(xué)畢業(yè)設(shè)計（論文） 附錄：英文翻譯附錄：英文翻譯英文原文Energy transfer mechanism in a vibrating fluidized bedAbstractThe mechanism of vibration energy transfer in a vibrating fluidized bed (VFB) is reported in this paper. A series of sensors was employed to simultaneously detect pressure wave propagation signals at different positions at various heights in the fluidized bed. The mechanism of vibration energy transfer in an VFB is found by wave propagation. The pressure wave was produced from a vibrating base at the bed bottom and transferred to the particle bed via an air gap formed between the distributor and particle bed. The pressure waves oscillate and superpose in the luidized bed due to wave reflection at the surface boundary and the bottom of the fluidized bed, leading to the wave energy dissipation being mainly in the bed. The wave propagation process and its mechanism in a fluidized bed have been analyzed. The pressurewave propagation parameters were numerically calculated from the detected wave signals. The wave propagation velocities were found to be in the range of 9–75 m/s in the experiments. Keywords: Vibrating fluidized bed。導(dǎo)師謙和的秉性、淵博精深的學(xué)術(shù)造詣、嚴(yán)謹(jǐn)求實的治學(xué)精神、高尚的品德和博大的胸懷，時刻都在熏陶著我，使我受益匪淺。從選題，方案的確定和設(shè)計，到最后圖紙的審查修改，都得到了導(dǎo)師的悉心指導(dǎo)。東北大學(xué)畢業(yè)設(shè)計（論文） 參考文獻(xiàn)參考文獻(xiàn)1. 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