scholarly journals Critical heat flux in saturated forced convective boiling on a heated disk with an impinging jet (In a high pressure region)

1986 ◽  
Vol 52 (476) ◽  
pp. 1799-1804
Author(s):  
Masanori MONDE ◽  
Osamu NAGAE ◽  
Yoriyuki ISHIBASHI
1991 ◽  
Vol 113 (3) ◽  
pp. 722-727 ◽  
Author(s):  
M. Monde ◽  
T. Inoue

The existing data for critical heat flux (CHF) on a disk heater cooled by multiple impinging jets have been correlated successfully by deriving a generalized correlation that can predict the CHF on a disk heater cooled by a single impinging jet with high accuracy. The generalized correlation for the CHF for the single jet can be applied to predict the CHF for multiple jets with an accuracy of ±20 percent, in spite of a great difference in the flow situation on a disk between a single jet and multiple jets.


1987 ◽  
Vol 109 (4) ◽  
pp. 991-996 ◽  
Author(s):  
M. Monde

Critical heat flux during forced convection boiling on an open heated disk being supplied with saturated liquids through a small round jet which impinges at the center of the disk has been studied experimentally employing refrigerant R12 at comparatively high pressures from 0.6 to 2.8 MPa. Generalized correlations, predicting the CHF within an experimental range of liquid-to-vapor density ratio 5.3–41.25 and the reciprocal of Weber number 2 × 10−3–2 × 10−7, are given for three different characteristic regimes: V-regime where the CHF increases with an increase in the jet velocity, I-regime where the CHF is nearly constant with jet velocity, and HP-regime where the CHF appears only at high pressure and again rises with an increase in the jet velocity.


Author(s):  
Will Lowry ◽  
Jihui Geng

Abstract A pressure vessel burst (PVB) is an explosion scenario commonly encountered at chemical processing and petroleum refining facilities. Existing methodologies are available to predict the blast loads resulting from a spherical or cylindrical PVB source, with the PVB source either at grade or at an elevation. In the case of an elevated PVB source, the resulting blast wave will reflect from the ground at an angle. This ground level reflection will result in the formation of a Mach stem at certain angles between the incident blast wave and ground, with the required angles dependent on the blast wave overpressure. The triple point associated with the Mach stem moves upwards as the Mach stem progresses forwards, which can create a region of high blast pressure. This paper focuses on the investigation of a methodology that can be used to determine the high-pressure region generated by the Mach stem, along with the associated blast pressure, as a function of the PVB source elevation and incident blast pressure.


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