«« Back

Numerical Study of the Influence of Jet on the Operation of Powder Fuel Scramjet
Author(s): Hongming Ding, Changfei Zhuo
Keywords: Scramjet; Numerical simulation; Powder fuel; Jet; Combustion efficiency
Metal powder fuel has high energy calorific value and volume calorific value, which is an excellent power fuel for future hypersonic vehicles. However, metal powder has poor flow characteristics, so it is difficult to mix with air effectively when it is injected into supersonic air laterally. The mixing degree of fuel and air is an important factor to improve the work efficiency of the engine. One of the ways to solve this problem is to introduce a jet (the primary jet) upstream of the powder fuel inlet to improve the mixing degree of fuel and air and increase the residence time. In this study, a two-dimensional scramjet combustor structure grid with two injectors which was used to numerically study and analyze the influence of different primary jet flow conditions on the performance of scramjet fueled with metal powder. The results show that the introduction of primary jet improves the mixing degree of powder fuel particles and air in the combustion chamber, prolongs the residence time of particles in the combustion chamber and improves the combustion efficiency of the metal powder. However, with the increase of the primary jet flow rate, the metal powder fuel combustion efficiency and engine thrust both increase and then decrease.

Journal of Applied Fluid Mechanics

The Journal of Applied Fluid Mechanics (JAFM) is an international, peer-reviewed journal which covers a wide range of theoretical, numerical and experimental aspects in fluid mechanics. The emphasis is on the applications in different engineering fields rather than on pure mathematical or physical aspects in fluid mechanics. Although many high quality journals pertaining to different aspects of fluid mechanics presently exist, research in the field is rapidly escalating.