Heat transfer in a pipe under conditions of transient turbulent flow

摘要

This paper is concerned with the response of fluid temperature within a heated pipe to imposed excursions of flow rate. Ex- periments are reported in which measurements of wall temperature and local fluid temperature were made with fully developed turbulent flow of water in a uniformly heated tube during and after ramp-up excursions of flow rate between steady initial and final values. The fluid temperature measurements were made using a traversable temperature probe incorporating a thermocouple ca- pable of responding to turbulent fluctuations of temperature.