Heat-releasing process

The combustion processes which control the critical depressurization rate are not understood. Landers (LI) and Von Elbe (VI) have tired to derive an expression for the critical depressurization rate, but the transient combustion model they used is far too simplified to predict the effects shown in Figs. 24 and 25. One possible explanation for these large variations would be that heat-release processes within the solid phase are important. From light-emission measurements during depressurization, Ciepluch observed that it was much easier to eliminate light emission than to terminate combustion (i.e., approximately 12,000 psi/sec produced light emission, compared with 100,000 psi/sec for termination). 

In Chapter 8.5, B. Veyssiere exposes the state of knowledge in detonations. Particular features of the complex multidimensional structure of detonations are presented in relation with the recent results obtained either by nonintrusive optical diagnostics or numerical simulations from high performance calculations. The role of transverse waves in detonation propagation, the existence of correlations between the characteristic dimension of the cellular structure and the critical conditions for detonation initiation and detonation transmission, and the influence of the nonmonotonous heat release process behind the front are examined. Recent developments in the study of spinning detonations are also discussed. 

Kubota, N., and Aoki, 1., Characterization of Heat Release Process of Energetic Materials , 30th International Annual Conference of the ICT, Karlsruhe, 1999. 

Acoustic Wave. Whenever the thermal energy is deposited into the matrix by the grating light, the TG signal appears. However, the heat releasing process does not directly relate to the rise of the TG signal in a... 

When the heat releasing process is not impulsive but rises with an exponential function... 

The heat release process of KBL anthracite coal takes place before 40°C by the test of C80 micro calorimeter, which is a process of slow heat release at lower temperature then accelerated heat release at higher temperature from the initial heat... 

Whereas the idea of pulse combustion has been known since the turn of the century, interest in this technique to enhance energy-intensive processes has grown in recent years because of its potential to increase productivity, reduce poUutant emissions, and produce significant fuel savings. The term pulse combustion originates from the fact that the combustion and heat-release processes vary periodically in time. Such periodic combustion of a liquid or gaseous fuel creates... 

To measure the hydration heat release process of binder, the auto isothermal calorimeter of TAM Air was used. Tests were conducted using binder of 10 g and w/b ratio of 0.40 and the test temperature was 25 °C. 

Where T is the average temperature in a reactor, AT is the temperature gradient in a reaction zone, E and Ep are the activation energies of the chain transfer and chain growth reactions. The temperature gradient AT in a reaction zone is determined by the balance of the heat release process in a reaction zone and its dissipation in a convective transfer process ... 

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