Heat transfer and friction performance for nonstandard staggered fin array with top clearance aligned parallel to air flow

The heat transfer and friction performance for five kinds of nonstandard staggered fin arrays with top clearance aligned parallel to air flow were investigated experimentally by naphthalene sublimation technique. The correlated equations of Sherwood number and friction coefficients varied with Reynolds number were given, and the effect of fin stagger on the heat transfer and friction performance of nonstandard staggered fin array was also analyzed. The experimental results are useful for solar collector design.