Heat Transfer Characteristics of Flame Tube Ribbed Wall of Pure Hydrogen Gas Turbine
In this paper,aiming at the convective heat transfer cooling problem of the ribbed wall of the flame tube of pure hydrogen gas turbine,the fluid-solid coupling numerical simulation method is used to study the flow and heat transfer characteristics and laws of the remaining 11 rib design schemes (e=3～5mm,P=15～30mm) on the basis of the existing flame tube rib structure (rib height e=3mm,rib spacing P=20mm ),and further optimize the existing flame tube cooling structure. The results show that when the rib height e=3mm and 4mm,the heat transfer performance decreases with the increase of rib spacing. When the rib height e=5mm,the periodic increase of heat transfer performance decreases with the increase of rib spacing. When the rib spacing P=15mm and 20mm,the increase of rib height makes the heat transfer effect increase first and then decrease;when the rib spacing P=25mm and 30mm,the heat transfer effect increases with the increase of rib height. The heat transfer effect is the best when the inter-rib height ratio P/e is between 3～5.The comprehensive analysis shows that the heat transfer effect is the best when P/e=3.75. Compared with the existing structure,when the rib height e=4mm and the rib spacing P=15mm,the convective enhanced heat transfer coefficient increases by 2.6％,the friction factor increases by 43％,and the average wall temperature decreases by 5.2％.
Pure Hydrogen Gas TurbineConvective Heat TransferFluid-solid CouplingRibbed WallP/CHeat Transfer Per-formance
万方数据
维普
