Open AccessHeat transfer at the stagnation point of the impinging laminar jet
Author(s) -
В. В. Леманов,
Vitaly Matyunin,
Z. Trávníček
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1677/1/012018
Subject(s) - stagnation point , mechanics , laminar flow , jet (fluid) , heat transfer , stagnation temperature , turbulence , reynolds number , stagnation pressure , thermodynamics , materials science , physics , mach number
Heat transfer of an impinging axisymmetric jet at low Reynolds numbers (Re = 250-5000) at the obstacle stagnation point was studied experimentally. An air jet from a long tube was flowing onto a flat heated plate at a constant wall temperature. The distance from the jet beginning to the obstacle was h/d = 20. A connection of thermal parameters (averaged and pulsating) at the stagnation point for the flow at the initial cross-section of the jet was established. For the laminar flow, an increase in heat transfer of more than 200% was observed in the jet in comparison with the turbulent flow. Comparison of the obtained data on heat transfer revealed a significant discrepancy with the well-known correlation formula for impinging jets.