Effect of Inclination Angle on Pool Boiling Heat Transfer in a Partially Annular and Blocked Fluid Passage

Key Points

• The study aims to explore how varying the inclination angle affects heat transfer during pool boiling in a partially annular fluid passage.
• Conducted experiments using a stainless steel tube with a 19.1 mm outer diameter.
• Varying the inclination angle from 0° to 90° while maintaining a blocked lower fluid passage.
• Measured heat transfer coefficients and identified boiling mechanisms.
• An increase in inclination angle or a decrease in gap size resulted in higher heat transfer coefficients.
• A critical heat flux of 50 kW/m² was observed at a gap size of 3.65 mm and 0° inclination.
• Notable changes in local and average heat transfer coefficients were recorded.

Abstract