Effect of Shock Strength on the Radiation of Focusing Shock Wave

TL;DR

This study investigates how increasing shock strength affects the radiation emitted by focused shock waves in high-temperature air, revealing shifts in UV emission and estimating gas temperature at 13000 K.

Contribution

It demonstrates the impact of shock focusing on radiation characteristics and provides spectral analysis of the emitted radiation in high-temperature air.

Findings

Radiation shifts towards UV with increased shock strength

Atomic and molecular emissions observed from the shock radiation spectrum

Gas temperature estimated at approximately 13000 K

Abstract

High temperature radiating Air is produced experimentally by focusing a shock wave with the help of a spherically converging test section attached to a shock tube. The converging section concentrates the shock to a point with minimum diffusion losses. A shift in radiation towards the UV region was observed with an increase in the strength of the focusing shock wave. The atomic and molecular emission was observed from the radiation spectrum. Along with the emission from molecules of Air, emissions from contaminations were also observed. The temperature of the radiating gas was estimated using the blackbody radiation curve and was observed to be 13000 K.