HEAT-EXCHANGE SURFACE Russian patent published in 2003 - IPC

FIELD: heat-power engineering; thermal power plants; various industrial plants. SUBSTANCE: heat- exchange surface includes wall having spherical dimples located in parallel rows forming concavities on one side and convexities on other side. On side of concavities, air flows around wall and on side of convexities, wall is washed with heat-transfer agent, water for example. Some spherical dimples are provided with fuel injectors located in rear part of dimples in way of motion of main flow and are communicated with fuel supply manifold. Spherical dimples which are not provided with fuel injectors are provided with toroidal projections smoothly engageable with flat portion of surface and with surface of dimple. Dimples which are provided with fuel injectors are also provided with permeable hemispherical shields at spaced relation to walls of dimples; they are rigidly secured on edges of spherical dimples. EFFECT: enhanced efficiency, stability and completeness of combustion; enhanced reliability; increased service life. 7 dwg