Identification of steam-water two-phase flow regimes in vertical upward tube

• Autorzy: Bai B. , Guo L. , Zhao L.
• 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

Both the fluctuating static pressures on the tube wall and the differential pressure fluctuation were measured to obtain the objective identification of steam-water two-phase flow regimes in a vertical upward tube of 20.0-mm interior diameter. The test pressures were 1.0MPa, 2.0MPa and 3.0MPa and the mass flux ranged from 100 to 900kg/m²s. The fluctuating mechanisms were studied by the statistical theory. The root mean square (RMS) of the pressure fluctuation can not be used to discriminate the flow regime transition under the condition of the high pressure, which was used successfully by Wambsganss in air-liquid loop. The frequency of differential pressure fluctuation ranged from 0 to 5 Hertz, and the shapes of the PDF and PSD concerned the various flow regimes. The flow regimes can be identified based on the RMS of the differential pressure fluctuation. The results by the method agreed well with the flow regimes provided by McQuillan and Whalley.

Słowa kluczowe

EN

flow regime; possibility density function; power spectrum density; root mean square; pressure fluctuation; differential pressure fluctuation

• Wydawca: Wydawnictwo Politechniki Świętokrzyskiej
• Czasopismo: Zeszyty Naukowe Politechniki Świętokrzyskiej. Mechanika
• Rocznik: 1999
• Tom: Z. 67
• Strony: 173--183
• Opis fizyczny: Bibliogr. 13 poz., rys., wykr.

Twórcy

autor

Bai B.

• Xian Jiaotong University, State Key Lab of Multiphase Flow in Power Engineering, Xian, 710049, P.R.China

autor

Guo L.

• Xian Jiaotong University, Xian, 710049. P.R.China

autor

Zhao L.

• Xian Jiaotong University, Xian, 710049, P.R.China

Uwagi

EN

The authors wish to acknowledge the financial support given this study under National Natural Science Foundation of China.