Methods and the investigation data of the heat exchange at a different orientation of the high-temperature surface cooled by the dispersed water

Представлены методика и результаты исследования теплообмена при охлаждении высокотемпературной поверхности диспергируемой водой, подаваемой форсункой снизу-вверх на локальный тепломер. Плотность орошения поверхности тепломера измерялась с применением счётно-импульсного метода. В опытах исключалось попадание на выступающей тепломер «вторичных» капель и плёнки воды, поступающих с соседних участков поверхности. Установлено, что при отсутствии «балластной воды» разное ориентирование орошаемой поверхности не влияет на результаты, а теплосъём зависит только от плотности орошения.The cooling of ingots and rolled metal in practice showed that the cooling intensity of high-temperature surface by the dispersed water supplied by the nozzles from the bottom to the top is lower in comparison with the delivery of the drop flow from the top to the bottom at the same irrigation conditions. This was confirmed by the metallographic analysis. This paper describes the experimental studies of the heat exchange in laboratory conditions while cooling the high-temperature surface by the dispersed water delivered by the nozzle from the bottom to the top to the local calorimeter. The irrigation density of the calorimeter surface was measured using the counter-pulsed method with the preliminary graduation of it by the sample tube. A local calorimeter projected above the irrigated surface was used for the experiments. The ingress of reflected drops and the water film arriving from adjacent surface sections was prevented.It has been established that a different orientation of the irrigated surface, if the "ballast" water is unavailable, produces no influence on the obtained results and the heat collection depends just on the irrigation density