In order to investigate the breakup behavior of the liquid sheet formed by gelled propellant impinging injector

a linear instability analysis method and the power-law constitutive equation were used.The effects of the liquid properties and rheological parameters on the stability of liquid sheet were studied.The results show that as the consistency coefficient

flow index and surface tension increase

the surface wave growth rate decreases and the wavelength increases.A larger liquid sheet velocity

gas to liquid density ratio and sheet thickness can accelerate the growth of surface wave.The wavelength decreases with the increase of sheet velocity and gas to liquid density ratio

while the opposite is true for liquid sheet thickness.The comparison between the theoretical and experimental results shows that the linear instability analysis method can predict the breakup length well

but the predicted wavelength is larger than experimental results.