Correlation of exhaust-valve temperatures with engine operating conditions and valve design Page: 4 of 26
This report is part of the collection entitled: National Advisory Committee for Aeronautics Collection and was provided to Digital Library by the UNT Libraries Government Documents Department.
Extracted Text
The following text was automatically extracted from the image on this page using optical character recognition software:
NACA ARR No. E5I20 3
Tw
ro
Tg Ta
where
Ta cooling-air temperature
Tg mean effective gas temperature
Tw wall temperature
ql coefficient of heat transfer from gas to wall
rf thermal resistance of fins
ro over-all thermal resistance from point on inside of cylinder
to cooling air
rw thermal resistance of cylinder wall
When a heat balance is set up for a point on the inside surface
of the wall, the heat transferred to the wall H is
H = ql A (Tg - T) (1)
where A is the area considered. Heat transferred away from the
wall .H is
H = - A (Tw - Ta)
ro
o (2)
= Ko A (Tw - Ta)
where Ko is the over-all conductivity from a point on the inside
of the wall to thu cooling air.
Upcoming Pages
Here’s what’s next.
Search Inside
This report can be searched. Note: Results may vary based on the legibility of text within the document.
Tools / Downloads
Get a copy of this page or view the extracted text.
Citing and Sharing
Basic information for referencing this web page. We also provide extended guidance on usage rights, references, copying or embedding.
Reference the current page of this Report.
Zipkin, M. A. & Sanders, J. C. Correlation of exhaust-valve temperatures with engine operating conditions and valve design, report, October 1945; (digital.library.unt.edu/ark:/67531/metadc279466/m1/4/: accessed February 19, 2019), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.