An experimental study of CHF and power transients in flow boiling at low-pressure low-flow conditions. Issue 6 (2nd November 2019)

• Record Type: Journal Article
• Authors: Vadlamudi, Sai Raja Gopal; Nayak, Arun K.; Ghosh, Pradyumna
• Is Part Of: Experimental heat transfer. Volume 32:Issue 6(2019)
• Page Start: 509
• Page End: 523
• Publication Date: 2019-11-02
• Subjects: Flow boiling -- critical heat flux -- low-pressure and low-flow conditions -- power transients; Heat -- Transmission -- Measurement -- Periodicals; 621.4022
• DOI: 10.1080/08916152.2018.1545807
• Languages: English
• ISSNs: 0891-6152

Abstract

ABSTRACT: Flow boiling experiments were conducted in an annular channel at very low flow rates and atmospheric pressure varying the inlet subcooling from 20 to 40 ∘ C . critical heat flux occurred during the oscillatory flow pattern transition from slug to churn regime. Comparison of low-pressure and low-flow critical heat flux correlations with the present data has shown that these correlations are not applicable for prediction of critical heat flux under oscillatory flow pattern transition from slug to churn. Power transient experiments were also performed at low-pressure and low-flow conditions. Flow regimes and the sequence of events leading to critical heat flux were visually observed using the high-speed camera.