Inlet steam quality of a top break hole on horizontal pipe

【摘要】 <正> The inlet steam quality of the top break on horizontal pipe was investigated on the high pressure steam-water two-phase loop of Xi’an Jiaotong University using the γ-ray attenuation technique. The mass attenuation coefficient of the γ-ray penetrating high pressure saturated water was measured, and it is shown that such a coefficient nearly keeps constant. The correlation of the inlet steam quality to the dimensionless number h/hb was obtained. The experimental results also indicate that the break inlet pressure was reduced due to the Bernoulli effect induced by the two-phase mixture advancing into the break. Such a pressure loss was verified to be an important and sensitive parameter to determine the critical discharge mass flow rate.更多还原

【Abstract】 The inlet steam quality of the top break on horizontal pipe was investigated on the high pressure steam-water two-phase loop of Xi’an Jiaotong University using the γ-ray attenuation technique. The mass attenuation coefficient of the γ-ray penetrating high pressure saturated water was measured, and it is shown that such a coefficient nearly keeps constant. The correlation of the inlet steam quality to the dimensionless number h/hb was obtained. The experimental results also indicate that the break inlet pressure was reduced due to the Bernoulli effect induced by the two-phase mixture advancing into the break. Such a pressure loss was verified to be an important and sensitive parameter to determine the critical discharge mass flow rate.更多还原