The flow disturbance and heat transfer mechanism in the tube bundle of Rod baffle shell-and-tube heat exchanger are analyzed, on the basis of which and combined with the concept of heat transfer enhancement in the core flow, a new type of shell-and-tube heat exchanger with a combination of rod and van type spoiler was designed. Corresponding mathematical and physical model on the shell side about the new type heat exchanger are established, and fluid flow and heat transfer characteristics are numerically investigated. The simulation results showed that the heat transfer coefficient of the new type of heat exchanger approximates that of rod baffle heat exchanger, but the flow pressure drop is much less than the latter, which indicate that the comprehensive performance of the former is superior to that of the latter. Compared with rod baffle heat exchanger, the heat transfer coefficient is higher under same pressure drop, especially under the high Reynolds numbers.
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