Investigation of critical heat flux with decrease in flow through a heated tube

Journal Article · Sat Sep 01 04:00:00 EDT 1973 · Therm. Eng. (USSR) (Engl. Transl.), v. 19, no. 9, pp. 122-126

OSTI ID:4366030

Smirnov, O K; Pashkov, L T; Zaitsev, V N

Translated from Teploenergetika; 19: No, 9, 83-85 (1972). An experimental investigation of the influence of the unsteady state caused by a decrease in mass flow of the medium on the conditions of the origination of critical heat flux is described. Values of boundary parameters of critical heat flux were obtained with boiling under steady conditions and under dynamic conditions. The investigation showed that critical heat flux takes place at a mass velocity under dynamic conditions different from the mass velocity for steady conditions for the same enthalpies of the medium. Dynamic experiments with a single decrease in mass flow without maintaining constant pres sure showed that in this case low-frequency oscillations of the flow can occur under certain conditions in the experimentl channel. The oscillations were accompanied by sharp oscillations of water temperature, which indicate the occurrence and disappearance of critical heat flux. Under such conditions the highest elevation of wall temperature was first observed in the intermediate cross sections of the channel. (LCL)

• Research Organization: Moscow Power Inst.
• NSA Number: NSA-29-010082
• OSTI ID: 4366030
• Journal Information: Therm. Eng. (USSR) (Engl. Transl.), v. 19, no. 9, pp. 122-126, Journal Name: Therm. Eng. (USSR) (Engl. Transl.), v. 19, no. 9, pp. 122-126; ISSN THENA
• Country of Publication: Country unknown/Code not available
• Language: English

Related Subjects

*BOILING-- CRITICAL HEAT FLUX
*CRITICAL HEAT FLUX-- UNSTEADY FLOW
FLOW RATE
FLUID FLOW
HEAT TRANSFER
N42300* --Engineering--Heat Transfer & Fluid Flow
OSCILLATIONS
STEAM
TUBES
WATER