{[ promptMessage ]}

Bookmark it

{[ promptMessage ]}


Averaging_Example_StudentWork - An Example of Averaging...

Info iconThis preview shows page 1. Sign up to view the full content.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: An Example of Averaging Parameters 1 Air and water flow at high pressure (about 80 atmospheres) in a round tube. A slug flow forms. The geometry – cylindrical slugs of gas along the centerline, liquid everywhere else – is shown below. Assume upflow as shown. Assume a single gas velocity and a single liquid velocity applies everywhere. Diameter: 0.0071 m Diameter: 0.01 m 0.02 m 0.08 m Given the following (take phase densities as constants and mass flow rates as time averages). ρg = 100 kg m−3 (1) (2) −1 ρf −3 (3) = 1000 kg m mg = 0.005 kg s ˙ mf ˙ −1 = 0.05 kg s (4) Assume the gas slugs are coherent, periodic structures – they all travel at the same speed and keep constant distance between one another. Compute the following: 1. Compute the time-averaged flow quality, x. 2. Compute the time-average superficial velocities, {jf } and {jg }. 3. Compute the volume-averaged void fraction, < α >, over the entire length of the tube. Is this the same as {α} = {α}? 4. Compute the time-averaged volumetric fraction, {β }. 5. Compute the time-averaged static quality xst . 6. Compute the time-average phase velocities: {vf }f and {vg }g . 7. Compute the slip ratio, S . 8. Plot the instantaneous area-averaged void fraction {α} at some arbitrary axial location as a function of time. ...
View Full Document

{[ snackBarMessage ]}

Ask a homework question - tutors are online