In this study laminar forced film condensation of vapor flowing in cross-flow
direction through the annular space between two concentric cylinders was
investigated numerically. To achieve this, governing equations of the vapor and the
condensate flow in cross-flow direction between two concentric cylinders were
developed. After obtaining the equations in integral forms by using the finite
difference technique the vapor boundary layer thicknesses on the inner and outer
cylinders and the condensate layer thickness was obtained as a function of the
angular position on the cylinders. It was assumed that the condensation took place on
the outer surface of the inner cylinder only and the outer cylinder was assumed to be
insulated. The computer program developed is capable to calculate the condensate
film thickness, vapor boundary layer thickness, the heat flux and the heat transfer
coefficient and the interface velocity between the condensate and the vapor layer as a
function of the angular position on the cylinders. Effects of changing the free stream
velocity flowing in the channel, the radius of the inner cylinder, the temperature
difference between the saturated vapor and the wall and the annular space between
the concentric cylinders were investigated numerically by using the computer
program and the results were presented graphically. Results showed that by
increasing the free stream velocity of the vapor in the core, the film thickness
decreased and by increasing the radius of the inner cylinder, the temperature
difference between the saturated vapor and the wall and the annular space, the film
thickness increased.
| Identifer | oai:union.ndltd.org:METU/oai:etd.lib.metu.edu.tr:http://etd.lib.metu.edu.tr/upload/12607714/index.pdf |
| Date | 01 September 2006 |
| Creators | Atilgan, Ahmet Koray |
| Contributors | Yamali, Cemil |
| Publisher | METU |
| Source Sets | Middle East Technical Univ. |
| Language | English |
| Detected Language | English |
| Type | M.S. Thesis |
| Format | text/pdf |
| Rights | To liberate the content for public access |
Page generated in 0.0023 seconds