نتایج جستجو برای: burning rate
تعداد نتایج: 976615 فیلتر نتایج به سال:
To identify the characteristics of completed suicide by burning in Tehran. A retrospective analysis of data obtained from Tehran's Legal Medicine Organization and judiciary system over 5-years (from 2002 to 2006). During the 5 years, 374 decedents (64.2% female and 35.8% male) were diagnosed as suicide by self-burning, and the annual incidence rate was 0.9 per 100,000 general population-years. ...
We calculate the rate of hydrogen burning for neutron stars (NSs) with hydrogen atmospheres and an underlying reservoir of nuclei capable of proton capture. This burning occurs in the exponentially suppressed diffusive tail of H that extends to the hotter depths of the envelope where protons are rapidly captured. This process, which we call diffusive nuclear burning (DNB), can change the H abun...
An internal ballistics model has been developed for performance prediction of a solid propellant rocket motor. In this model a 1-D unsteady Euler equation with source terms is considered. The flow is assumed as a non-reacting mixture of perfect gases with space and time varying thermo physical properties. The governing equations in the combustion chamber are solved numerically by using the Steg...
In this paper the Cross-linked double base propellant (XLDB) based on polyurethanes comprised of polycaprolactone (PCP) as binder and ammonium perchlorate (AP) and RDX as solid oxidizer have been prepared and characterized. Propellant burning rate were determined by the strand burner method (Crawford bomb). In the AP-based composition, the energy is enhanced and the pressure exponent reduced ...
In this research and according to level set method, 3D complex grains burn-back analysis is numerically simulated. The complicated grains that we have considered in this research, are included four types of difficulties that are insulated regions, different burning rates, non-uniform burning rates and oriented burning rates. To this end, the classical algorithm that is developed by authors, wil...
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