Linear stability analysis of a vapor film at melt jet-coolant interface

• Autorzy: Evdokimov I. A. , Khoruzhii O. V. , Likhanskii V. V.
• Konferencja: International Conference on Heat Transfer and Transport Phenomena in Multiphase Systems HEAT '99 (2; 18-22.05.1999; Kielce, Poland)
• Języki publikacji: EN

Abstrakty

EN

As a consequence of severe reactor accident, both in-vessel and ex-vessel pouring of melt jets into coolant pool below is possible. Breakup of these jets determines the further accident progression. Previous research was concentrated on in-vessel situation and available models of jet breakup were developed for film boiling conditions with thick vapor blanket. The present paper addresses the ex-vessel case which assumes relatively thin vapor films at jet surface. The existence of vapor layer with high viscosity at the jet-coolant interface may, under certain conditions, substantially change the flow instability features. The present work is aimed on adequate examination of the particular role played by viscous vapor film in jet fragmentation process. Analysis is based on the linear stability theory which allows to establish typical instability features. The criteria of change in fragmentation behavior are also found in the framework of proposed approach.

Słowa kluczowe

EN

fuel-coolant interactions; jet breakup; film boiling; linear stability analysis

• Wydawca: Wydawnictwo Politechniki Świętokrzyskiej
• Czasopismo: Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika
• Rocznik: 1999
• Tom: Z. 67
• Strony: 215--224
• Opis fizyczny: Bibliogr. 6 poz., rys., wykr., wzory

Twórcy

autor

Evdokimov I. A.

• State Research Center of Russian Federation, Troitsk Institute of Innovation and Fusion Research (TRINITI), Nuclear Safety Department, 142092 Troitsk, Moscow reg., Russia

autor

Khoruzhii O. V.

• State Research Center of Russian Federation, Troitsk Institute of Innovation and Fusion Research (TRINITI), Nuclear Safety Department, 142092 Troitsk, Moscow reg., Russia

autor

Likhanskii V. V.

• State Research Center of Russian Federation, Troitsk Institute of Innovation and Fusion Research (TRINITI), Nuclear Safety Department, 142092 Troitsk, Moscow reg., Russia

Uwagi

EN

The work has been supported by grant of Russian Foundation for Basic Research.