THE INFLUENCE OF INITIAL CONDITIONS ON THE ORIGIN OF THE BOILING CRISIS WITH NON-UNIFORM HEATING OF THE PERIMETER OF A PIPE
Abstract
Effort was directed to a determination of the critical heat flows and an investigation of the manner in which they are influenced by non-uniform heating of the perimeter of the pipe with strong throttling of the working medium at the inlet. Steam with critical parameters (P equals 300 abs atm, t sub per equals 600 C) passed from the boiler to the steam cooler with the required cooling surface, where it was cooled down to a specific heat content, and then to the experimental section. In this section the working medium was throttled to a pressure close to atmospheric and the water-vapor mixture entered the condenser. Seamless pipes made of EYalT stainless steel were used in the experimental section. The pipes were heated by passing an electric current through them. The values of the local and mean heat flows were determined from the measured current, the geometric dimensions and the known electrical resistance of the pipe material. With non-uniform heating of the pipe around the perimeter the boiling crisis always occurred in the zone of maximum heating, and the local heat flow in this zone was taken as the critical heat flow. Bubble boiling continued in the zone of realitively weak heating. (Author)
Document Details
- Document Type
- Technical Report
- Publication Date
- Aug 07, 1961
- Accession Number
- AD0262612
Entities
People
- I.l. Mostinskiy
Organizations
- National Air and Space Intelligence Center