Influence of Doped H2O or H2 on Soot Production and Power Capability in the Fuel-rich Gas Generator

Abstract

ABSTRACT Influence of doped H2O or H2 on both soot production and power capability in the fuel-rich gas generator has been studied together by using the program of chemical equilibrium with applications (CEA). The oxidant is LOX, and the fuel is composed of Jet-A and the additive. The parameters of the gas generator are as follows: the range of combustion temperature is 800–1700 K, combustion pressure is 0.1–5.0 MPa, oxidant/fuel ratio is 0.1–1.2, and the mass percent of the additive in fuel is 0–60%. The results indicate that the addition of either H2O or H2 can obviously reduce the mass percent of soot in combustion products, and the reasons are discussed on the base of the products distributions. Moreover, the minimum amounts of addition to surrender mass percent of soot less than 0.1% are present. The effects of combustion pressure on soot mass percent in combustion products appear turning appoints around 1100 K, no matter the additive is H2O or H2. The addition of H2 can obviously improve the power capacity of combustion products in the whole temperature range. The addition of H2O can also improve slightly the power capacity of combustion products, when the combustion temperature is less than 1400 K. Effective molar weight of combustion products is the main factor affecting power capacity.