Study on the condensation pattern of steam jet under different back pressure conditions

摘要: In the practical application of engineering, the phenomenon of steam underwater immersion jet under high back pressure conditions (>0.1MPa) exists. However, most of the current research on steam immersion jet condensation flow patterns and their boundaries is conducted under atmospheric pressure conditions (0.1MPa). The applicability of condensation flow patterns and related prediction formulas derived under atmospheric pressure to high back pressure conditions remains to be validated. Based on the experimental research, the condensation pattern of steam underwater immersion jet under different back pressure conditions is identified, and the condensation behavior of the jet under different back pressure conditions is clarified by comparing and analyzing the visual images and dynamic pressure characteristics of different condensation flow patterns, and the influence law of back pressure and other parameters on the condensation flow pattern boundary is mastered. This study fills the gap in the research of steam underwater immersion jet under the condition of high back pressure, which has important scientific research significance and engineering application value.