Metal fin manufacturer Sanqian will introduce the metal fin form to you today. So far, the following types have appeared: straight fins, perforated fins, sawtooth fins, corrugated fins, spike fins, louver fins, and strip fins. film etc. Commonly used are straight fins, porous fins, serrated fins, and corrugated fins.

Early research was mainly based on experiments, but expensive mold costs make this kind of research very expensive, so this kind of research often lags behind commercial production. With the increasing development of computing technology, the research method using computational fluid dynamics numerical simulation as a research method has played an increasingly important role. This method can be used to optimize the product before it is finalized.

Metal fin form

1. Straight fins

Metal fin manufacturer Sanqian found that the fin spacing has a significant effect on the heat transfer coefficient, while the number of tube rows has little effect on the air pressure drop. When studying this issue, industry experts pointed out that the development of the boundary layer is an important factor restricting the heat transfer characteristics of single-row tubes. Through the three-dimensional numerical simulation of the channel between the plates, it is found that as long as the fin spacing is small enough, the vortex behind the tube will be suppressed by the wall effect of the fins, and the entire flow field will be in a laminar flow state at this time. With the help of visualization experiment technology, the study found the influence trend of fin spacing on flow and heat transfer behavior, and there is a better value of fin spacing to enhance heat transfer.

2. Corrugated fins and punched fins

The research on the heat transfer mechanism in the corrugated fin channel found that there is a critical Reynolds number Re, and the effect of the number of tube rows on heat transfer is opposite to that of straight fins, but the magnitude of the change is much smaller than that of straight fin tube bundles.

3. Louver fins

The researchers conducted experimental studies on louver fins and obtained a correlation between heat transfer and flow resistance. Numerical simulation studies on the elliptical tube and circular tube louvered heat exchangers show that the heat transfer on the leeward side of the tube deteriorates, and the front edge effect of the louver plays an important role in enhancing heat transfer. Comparing the elliptical tube and the circular tube The overall heat transfer effect of the elliptical tube was found to be not as good as people expected before.

The above is the difference between metal fins introduced by metal fin manufacturer Sanqian. If you are interested in metal fin form, please contact us to read more.