Analysis of Hydrogen Gas Flow Instability in a Particle Bed
Nuclear thermal propulsion technology based on particle bed reactors holds tremendous advantages in scenarios like deep space exploration.However,the heating of hydrogen gas within the particle bed may cause flow instability.Understanding the mechanism behind this flow instability and accurately determining the instability boundaries is crucial for the safe operation of the particle bed reactor.In this study,a theoretical analysis on the flow process within a one-dimensional particle bed is conducted.The criterion for flow stability,an expression of the drag characteristic index,and the flow stability boundaries are derived.Utilizing the computational fluid dynamics method,the heat transfer process within the particle bed is simulated.Additionally,based on the pressure drop-flow characteristic curve,flow stability boundaries are derived.Both methods show similar trends in their predictions,providing essential references for the design of particle bed reactor-based nuclear thermal propulsion systems.
NETL
NSTL
万方数据
维普
