复合固体推进剂燃速模拟计算数值方法研究

INVESTIGATION ON THE NUMERICAL COMPUTATIONN METHODS TO SIMULATE THE BURNING RATE OF SOLID COMPOSITE PROPELLANTS

关键词:  推进剂燃速  模拟计算方法  复合推进剂  固体火箭推进剂

Key words:  Propellant burning rate  Simutation  Calculation methed  Composite propellant  Solid rocket propellant

摘要:

本文以改进的BDP燃烧模型为基础,叙述了燃烧速度计算的多种数值方法.对扩散火焰的模拟采用了精确求解与简化公式.结果表明,精确计算的程序对燃烧压力范围和氧化剂粒径大小可任一选取,并可以提高计算精度,而用简化近似计算仅对较大粒径的氧化剂和较高燃烧压力才是有效的.

Abstract:

In this paper, a study on the numerical computation methods for burning rate is conducted based on modified BDP combustion model. Accurate solution and simplified expression are employed in diffusion flame simulation. It is shown that the calculation accuracy of accurate method is higher, of which in the computer program the combustion pressure range and particle size of oxidizers can be selecled arbitrarily, and the simplified method are valid only for larger diameters of oxidizer particles and higher combustion pressures.