含硼碳氢燃料在超燃冲压发动机中的燃烧试验研究

Experimental Study on Combustion of Boron Containing Hydrocarbon Fuel in Scramjet

关键词:  含硼碳氢燃料  超燃冲压发动机  喷注特性  比冲  固相沉积

Key words:  Boron contained hydrocarbon fuel  Scramjet  Spray characteristics  Specific impulse  Solid deposition

摘要:

为提高碳氢燃料的能量密度，针对在高密度液体碳氢燃料中添加纳米硼颗粒的燃料方案，在超燃冲压发动机试验台上开展了点火燃烧性能试验验证。试验当量比为0.56~0.94，评估了硼颗粒添加对燃料喷注特性、比冲性能和固相沉积的影响。基于本文所用液体碳氢燃料，添加质量分数16%的硼颗粒可使超燃冲压发动机燃烧室平均密度比冲提升6.05%；硼颗粒添加会造成明显的壁面固相沉积问题，干扰压力测量系统获得有效数据。本试验初步评估了含硼碳氢燃料典型方案的喷注特性，获得了硼颗粒添加对燃料性能提升的定量结果。

Abstract:

In order to improve the energy density of hydrocarbon fuel， a fuel scheme of adding boron nanoparticles to high-density liquid hydrocarbon fuel was developed. The ignition and combustion performance test of the fuel was carried out on the scramjet test-bed. The equivalence ratio ranged from 0.56 to 0.94. The effects of boron particle addition on fuel injection characteristics， specific impulse performances and solid deposition were evaluated. The average density specific impulse of scramjet combustor can be increased by 6.05% by adding 16wt% boron particles into the liquid hydrocarbon fuel used in this paper. However， the addition of boron particles can cause obvious solid deposition problems and interfere with the pressure measurement system to obtain valid data. This study preliminarily evaluates the injection characteristics of boron-containing hydrocarbon fuel and obtains the quantitative results of improving fuel performance by adding boron particles.