Novel high-temperature precooler for aircraft environmental control system

Abstract

The invention discloses a novel high-temperature precooler for an aircraft environmental control system, and belongs to the technical field of aircraft environmental control systems. A precooler coreis of a plate-fin structure with compact structure and high cooling efficiency, and is made of pure nickel materials (fin parts), materials with good high-temperature heat performance, good processingtechnology, slow disintegration of high-temperature strength resistance and met using requirements of superalloys and working temperature resistance being above 400 DEG C, the working pressure beingof 7bar. A core assembly integrally adopts vacuum brazing, and the structure of the core asembly is nickel-superalloy fin precooler and high-temperature alloy plate fin precooler meeting the high temperature and large temperature difference working condition. According to the novel high-temperature precooler for the aircraft environmental control system, the risk problems of deformation, leakage and bursting of high-temperature precooler working under high temperature are solved, the using reliability and durability of products are improved, so that the precooler with the structure occupies animportant place in the aircraft environmental control system, and various function and performance requirements of high-temperature fluid, large temperature difference, thermal expansion deformationand compact and light structure are met.

Description

technical field [0001] The invention belongs to the technical field of aircraft cooling accessory systems, in particular to a novel high-temperature precooler used in an aircraft environmental control system. Background technique [0002] The high-temperature pre-cooler is a cooling accessory for the environmental control system of the aircraft. The high-temperature hot fluid and the low-temperature cold fluid of the cooling system perform heat exchange in the pre-cooler, so that the high-temperature hot fluid and the low-temperature cold fluid reach the required operating temperature range. , to ensure the normal operation of the aircraft environmental control system. [0003] Generally, when this type of precooler is used on conventional equipment, the working temperature is below 300°C, the temperature difference between cold and hot is below 200°C, and the influence of temperature and thermal stress is relatively small. With the R&D and market demand of ultra-high-power...

AI Technical Summary

Problems solved by technology

With the R&D and market demand of ultra-high-power and ultra-long-range aircraft, the power of such aircraft has doubled. The high-temperature precooler supporting the aircraft engine environmental control system has a working temperature above 400°C and a temperature difference between hot and cold above 300°C. The high-temperature working pressure reaches 7bar, high-temperature thermal deformation and thermal stress affect the strength function of the leakage and burst of the pre-cooler, and the safety and reliability of the pre-cooler are greatly affected, thereby affecting the functional performance and reliability of the aircraft environmental control system. performance and durability, and in severe cases, the quality failure of the aircraft parking in the air will occur

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