Reverse-flow intercooler core body based on various-length saw tooth fins

Abstract

The invention provides a reverse-flow intercooler core body based on various-length saw tooth fins. The reverse-flow intercooler core body based on various-length saw tooth fins specially designs saw tooth fin channel structures on two sides of reverse-flow gas and liquid, and arranges the flowing directions of gas and liquid by adopting a reverse flow mode; and the lengths of the fins present the gradual reducing tendency in the flowing direction of a working medium. The characteristics of higher convection heat exchange capacity and higher pressure loss of a working medium inlet section are used; longer fins are arranged in the area to guarantee higher the heat exchange capacity and relatively lower pressure loss in the area; shorter fins are arranged far from the inlet section to realize high-frequency damage of a boundary layer of the area to improve the heat exchange capacity; and although local flowing loss can be increased, as the pressure loss at the inlet section is relatively lower, the overall pressure loss of a channel is little different from a channel with uniform length distribution of the fins, and the heat exchange is improved.

Description

technical field [0001] The invention relates to intercooler technology, in particular to a counter-flow intercooler core body based on variable-length serrated fins. Background technique [0002] Gas turbine intercooling cycle is a cycle method that can effectively increase the power of marine gas turbines. It uses a double-circuit system to cool the air at the outlet of the low-pressure compressor, thereby reducing the power consumption of the high-pressure compressor and finally achieving the goal of increasing output power. [0003] One of the dual circuits is the on-board water / glycol-air intercooling system. The performance of the intercooler core is crucial to the efficient operation of the system. [0004] For the core of the intercooler, the gas outlet temperature should be reduced as much as possible while reducing the flow loss of the gas. [0005] Due to the special structure of the sawtooth fins, the fluid can form a strong disturbance in the channel, causing th...

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Problems solved by technology

[0006] However, the sawtooth fins will also cause a large pressure loss, which will reduce the pressure at the inlet of the high-pressure compressor. In order to ensure a constant total boost ratio, the pressure ratio of the high-pressure compressor will increase accordingly, which will eventually increase its power consumption. The original intention of the intercooling cycle is contrary to

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