The effect of key parameter changes on the critical heat flux of spray evaporatively-cooled vibrating surfaces using a single misting nozzle

TY - JOUR

T1 - The effect of key parameter changes on the critical heat flux of spray evaporatively-cooled vibrating surfaces using a single misting nozzle

AU - Sarmadian, A

AU - Jose, J Thalackottore

AU - Dunne, JF

AU - Long, CA

AU - Pirault, JP

AU - Rouaud, C

N1 - Funding Information: The authors acknowledge support for the development of the experimental facilities, in terms of funding from the EPSRC (under Contract Number: EP/M005755/1), and technical support from Ford Dunton UK, Ford Dearborn USA, Denso Italy, and the Ricardo Technical Centre Shoreham UK. The authors also wish to acknowledge additional financial and technical support from the Ricardo Shoreham Technical Centre, UK. The authors acknowledge that this paper is an extended version of their paper that was presented and published in the proceedings of the 15th International Conference on Heat Transfer, Fluid Mechanics and Thermodynamics (HEFAT2021), Online, 26 – 28 July 2021. Funding Information: The authors acknowledge support for the development of the experimental facilities, in terms of funding from the EPSRC (under Contract Number: EP/M005755/1), and technical support from Ford Dunton UK, Ford Dearborn USA, Denso Italy, and the Ricardo Technical Centre Shoreham UK. The authors also wish to acknowledge additional financial and technical support from the Ricardo Shoreham Technical Centre, UK. Publisher Copyright: © 2022 Elsevier Ltd

PY - 2022/8

Y1 - 2022/8

N2 - A new correlation model is examined for capturing the combined influences of surface-to-nozzle distance and coolant flow rate on critical heat flux associated with spray evaporative cooling of vibrating surfaces. The correlation model is constructed using dimensional analysis by applying the Generalized Buckingham Π-Theorem. The model is calibrated using experimentally-measured spray evaporative cooling data, taken from an electrically-heated horizontal flat circular test-piece excited by a shaker through a range of low and high frequencies of vibration, from small to large amplitude. To understand the combined effect of frequency, amplitude, and surface-to-nozzle distance, at critical heat flux, Vibrational Reynolds Number, Acceleration Number, and Dimensionless Surface-to-Nozzle Distance are used. The results show that surface-to-nozzle distance, in the presence of dynamic effects, significantly influences the critical heat flux, whereas vibration amplitudes and frequencies have differing effects in response to variations in both surface-to-nozzle distance and flow rate. Surface-to-nozzle distance can either increase or decrease the heat transfer, depending on the vibration range. The calibrated correlation model is capable of predicting the effect of surface-to-nozzle distance on the critical heat flux with errors in the range −4.8% and + 10.5%.

AB - A new correlation model is examined for capturing the combined influences of surface-to-nozzle distance and coolant flow rate on critical heat flux associated with spray evaporative cooling of vibrating surfaces. The correlation model is constructed using dimensional analysis by applying the Generalized Buckingham Π-Theorem. The model is calibrated using experimentally-measured spray evaporative cooling data, taken from an electrically-heated horizontal flat circular test-piece excited by a shaker through a range of low and high frequencies of vibration, from small to large amplitude. To understand the combined effect of frequency, amplitude, and surface-to-nozzle distance, at critical heat flux, Vibrational Reynolds Number, Acceleration Number, and Dimensionless Surface-to-Nozzle Distance are used. The results show that surface-to-nozzle distance, in the presence of dynamic effects, significantly influences the critical heat flux, whereas vibration amplitudes and frequencies have differing effects in response to variations in both surface-to-nozzle distance and flow rate. Surface-to-nozzle distance can either increase or decrease the heat transfer, depending on the vibration range. The calibrated correlation model is capable of predicting the effect of surface-to-nozzle distance on the critical heat flux with errors in the range −4.8% and + 10.5%.

UR - http://www.scopus.com/inward/record.url?scp=85132774948&partnerID=8YFLogxK

U2 - 10.1016/j.applthermaleng.2022.118815

DO - 10.1016/j.applthermaleng.2022.118815

M3 - Article

SN - 1359-4311

VL - 213

JO - APPLIED THERMAL ENGINEERING

JF - APPLIED THERMAL ENGINEERING

M1 - 118815

ER -