Abstract: Experimental investigation on the effect of non-condensable gas content, temperature and steam mass velocity on submerged steam jet condensation pressure oscillation was performed. Experimental conditions across condensation oscillation (CO) region and stable condensation (SC) region. Experimental results show that for pure steam jets, the pressure oscillation dominant frequency decreases with the rise of water temperature, while the pressure oscillation intensity increases with the rise of water temperature. Both pressure oscillation dominant frequency and intensity increase with steam mass velocity in CO region. However, the pressure oscillation dominant frequency decreases with the rise of steam mass velocity, and the pressure oscillation intensity hardly changes with the rise of steam mass velocity in SC region. For air-steam mixture gas jets, the pressure oscillation dominant frequency decreases with the rise of air mass fraction. However as the air mass fraction increases, the pressure oscillation intensity rapidly decreases at first, then slowly increases. Both pressure oscillation dominant frequency and intensity reach a minimum when the air mass fraction is between 0.05 and 0.1.