4Lutcha J, Nemcansky J. Performance Improvement of Tubular Heat Exchanger by Helical Baffles. Institution of Chemical Engineers, 1990,68 ( Part A) : 263 - 270.
5Kral D, Stehlik P, Master B I. Helical Baffles in Shell- and-Tube Heatexchangers, Part Ⅰ: Experimental Verification. Heat Transfer Engineering, 1996,17 ( 1 ) :93 - 101.