Model of heat transfer in the stagnation point of rapidly evaporating microjet

• Autorzy: Mikielewicz D. , Muszyński T. , Mikielewicz J.
• Języki publikacji: EN

Abstrakty

EN

The paper presents investigation into the single water microjet surface cooling producing evaporating film. Reported tests were conducted under steady state conditions. Experiments were conducted using the nozzle size of 70 and 100 [my]m respectively. In the course of investigations obtained were experimental relations between heat flux and wall superheating. It was proved that the phenomenon is similar to that of pool boiling but the boiling curves are showing a smaller value of critical heat flux (CHF) that the stagnant pool boiling. Values of CHF are also reduced with decreasing liquid subcooling. Theoretical model of surface cooling by evaporating microjet impingement in the stagnation point was described theoreticaly. Results of experiments were compared with predictions by the model showing a good consistency.

Słowa kluczowe

EN

CHF; microjet cooling; surface cooling

PL

chłodzenie mikrojetowe; chłodzenie powierzchniowe

• Wydawca: Wydawnictwo Instytutu Maszyn Przepływowych PAN ; Komitet Termodynamiki i Spalania PAN
• Czasopismo: Archives of Thermodynamics
• Rocznik: 2012
• Tom: Vol. 33, no. 1
• Strony: 139--152
• Opis fizyczny: Bibliogr. 9 poz.,

Twórcy

autor

Mikielewicz D.

autor

Muszyński T.

autor

Mikielewicz J.

• Gdansk University of Technology, Faculty of Mechanical Engineering, Narutowicza 12, 80-233 Gdansk, Poland,

Bibliografia

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• [7] LIU Z.-H., ZHU Q.-Z.: Prediction of critical heat flux for convective boiling of saturated water jet impinging on the stagnation zone. J. Heat Transfer 124(2002), 1125–1130.
• [8] OMAR A.M.T., HAMED M.S., SHOUKRI M.: Modeling of nucleate boiling heat transfer under an impinging free jet. Int. J. Heat Mass Transfer 52(2009), 5557–5566.
• [9] PLATA M.: Microjet cooling. Doctoral seminar, Gdańsk 2007.