Structure of thruster

Structure of thruster

Experiments have shown that the smoke from rocket exhaust is mainly composed of solid or liquid dust particles. These dust particles interact with charged particles 

in rocket plumes and carry a negative charge, which can affect the electromagnetic characteristics of microwave signals passing through them, causing varying degrees 

of interference and damage to microwave signals. In severe cases, it can affect the normal transmission of microwave signals for detecting and controlling aircraft flight. 

In the extensive research on rocket flares, the behavior of dust particles has not yet been considered. This article starts from the theory of dynamics and modifies the electromagnetic characteristics of general plasmas considering dust particles. This article first introduces the internal structure of the rocket jet flow field and the physical 

and chemical processes involved, and analyzes and investigates the electron density distribution and the density and size distribution of dust particles in the jet. The order

 of electron density has been determined to be between 1017 m~(-3) and 1019 m~(-3), and the density of dust particles is between 1010 m~(-3) and 1015 m~(-3). 

The minimum radius of dust particles is 1 μ m, and the maximum is 10 μ m. Using the Boltzmann dynamics equation and the charging equation of dust plasma, 

considering the collision and charging process between charged particles in the plasma, the conductivity, dielectric constant, and attenuation coefficient of dust 

plasma suitable for rocket jet environment are derived. The results indicate that due to the dust charging process, the conductivity, dielectric constant, and a

ttenuation coefficient of dust plasma are higher than those of general plasma. Finally, the dust plasma generated by rocket jet was used as an example to verify 

the above conclusion and analyze its characteristics