|
[Sponsors] |
January 30, 2013, 11:40 |
calculate pitching moment coefficient
|
#1 |
New Member
jyh
Join Date: Nov 2012
Posts: 25
Rep Power: 14 |
Hi all,
I'm studying 3D wingbody currently to get CL,CD,CM. In my results, CL,CD is acceptable compared to reference data. (each error is less then 10%) But CM, pitching moment coefficient is very far from reference. (error is over 300%) So i doubt my process to getting CM. First, reference paper said - Reference length(mac) : 0.6m - Moment reference point : 0.45m - Moment reference y-loc : 0.023m (down) So, I set the 'reference values' in Fluent - Length : 0.6m - and velocity, area And created 'moment monitor', Moment center => x : 0.45, y : -0.023 Moment Axis => z : -1 (for left-hand direction of nose-up) Wall zones : All surfaces of wingbody. and ran simulation. Am I right? How can be getting very far CM in spite of close CL and CD? Best Regards |
|
|
|
Similar Threads | ||||
Thread | Thread Starter | Forum | Replies | Last Post |
2D Airfoil Centre of Pressure, Pitch Moment and Pitch Moment Coefficient | aerospain | ANSYS | 2 | May 4, 2020 21:47 |
Force can not converge | colopolo | CFX | 13 | October 4, 2011 23:03 |
drag and moment coefficient problem | josip76 | FLUENT | 3 | June 12, 2011 11:45 |
Writing Moment coefficient for different walls at different rotational axis | harishameed33 | Main CFD Forum | 0 | April 27, 2010 13:17 |
Delta wing Pitching moment | Riaan | FLUENT | 1 | March 15, 2005 02:07 |