A comprehensive analytical model has been developed to describe the structure of dust detonatins which simultaneously computes both the ipduction and reaction zones. Heterogeneous reactions which occur on the external particle surface and on the surface of pores within the particle are used to model the chemistry. The overall reaction rate in the induction zone is controlled by the heterogencous surface reaction rate while in the induction xone is controled by the heterogeneous surface reactio rate while in the reaction zone diffusion of the gas into the pores is found to be the rate limiting step. Conduction heat transfer within the particle, convective heat transfer between the particles and the gas and chemical heat release within the particles are considered in this model to describe the temperature distribution witin the psrticles in both the induction and reaction xones. Thermal runaway is used as the criterion of igoition at the end of the induction zone and the singularity at the C-J plane is used to terminate the reaction zone. Thernalrunaway is used as the criterion of ignition at the end of the induction a lack of sufficient data, some contants used in this model were chosen to provide the best fit between the theory and experiment. The model made it possible to compute the structure of dust detonations without separate treatment of the induction and reaction zones and was used to determine the effects of particle size on detonation structure and propagation velocity. In those cases in which experimental data was available computed and measured results were in good agreement.

两相爆轰波的松驰结构明显区别于均相爆轰，除需考虑化学反应的影响外还需考虑两相流效应。本文的理论分析表明，化学反应效应和两相流效应对爆轰波松驰区内某些参数变化的影响是一对矛盾因素，这使得松驰区内的参数分布呈较为复杂的形态，均相爆轰中这类分布曲线往往是单调变化的。根据作者提出的云雾和粉尘爆轰模型所进行的计算表明理论分析与计算结果所呈现的姿势一致。文中还讨论了两相爆轰的C-J条件，Rayleigh方程和Hugonior方程，并根据计算绘制了Rayleigh曲线和Hugoniot曲线，这从另一侧面反映了两相爆轰波松驰结构的特征。

The propagation of a flame is investigated experimentally and theoretically for a large, horizontal combustion tube containing a mixture of air and aluminum powder with pre-existing turbulence. One end of the tube is closed and the other is connected to a large dump-tank. Twenty dispersion systems are used on the tube to produce a uniform suspension of aluminum dust in the tube with a mean diameter of 6mm. The characteristics of a flame front from the ignitors at the closed end are measured using photodiodes and the development of pressure is monitored by transducers. Experimental results revealed the entire process of an accelerating flame and the development of shock waves. A set of conservation equations for two-phase turbulent combustion flow is derived, using the two-fluid model, k-3 model, Hinze-Tchen model and EBU-Arrhenius model for turbulent combustion. The SIMPLE scheme usually applied to the homogeneous turbulent combustion is extended to fit this two-phase, reactive behavior. The results of calculations show the positive feedback coupling among combustion, expansion and turbulence during flame propagation. Computed and measured results are generally in good agreement.