HEAT EXCHANGER Russian patent published in 2001 - IPC

FIELD: gasifying cryogenic fuel in aircraft gas-turbine engines. SUBSTANCE: heat exchanger has parallel tubes connected by means of inlet and outlet collectors and arranged in shell which forms cavity with inlet and outlet for heat-transfer agent. According to invention, heat exchanger is mainly used for gasifying cryogenic fluid flowing inside tubes; tubes are located at pitch S at outer diameter of d_out; tubes are mounted in groups at pitch between groups of S₁ found from the following relationship 1,5≤S₁/d_out≤2,5 at pitch S found from relationship 1,5S/d_out≥. EFFECT: enhanced efficiency; reduced external resistance; avoidance of freezing on side of heat- transfer agent. 2 cl, 3 dwg