| タイトル | Effect of Velocity in Icing Scaling Tests |
| 本文（外部サイト） | http://hdl.handle.net/2060/20030063911 |
| 著者（英） | Anderson, David N.; Bond, Thomas H. |
| 著者所属（英） | Ohio Aerospace Inst. |
| 発行日 | 2003-06-01 |
| 言語 | eng |
| 内容記述 | This paper presents additional results of a study first published in 1999 to determine the effect of scale velocity on scaled icing test results. Reference tests were made with a 53.3-cm-chord NACA 0012 airfoil model in the NASA Glenn Icing Research Tunnel at an airspeed of 67 m/s, an MVD of 40 microns, and an LWC of 0.6 g/cu m. Temperature was varied to provide nominal freezing fractions of 0.8, 0.6, and 0.5. Scale tests used both 35.6- and 27.7-cm-chord 0012 models for 2/3- and 1/2-size scaling. Scale test conditions were found using the modified Ruff (AEDC) scaling method with the scale velocity determined in five ways. Four of the scale velocities were found by matching the scale and reference values of water-film thickness, velocity, Weber number, and Reynolds number. The fifth scale velocity was simply the average of those found by matching the Weber and Reynolds numbers. The resulting scale velocities ranged from 85 to 220 percent of the reference velocity. For a freezing fraction of 0.8, the value of the scale velocity had no effect on how well the scale ice shape simulated the reference shape. For nominal freezing fractions of 0.5 and 0.6, the best simulation of the reference shape was achieved when the scale velocity was the average of the constant-Weber-number and the constant-Reynolds-number velocities. |
| NASA分類 | Aerodynamics |
| レポートNO | NASA/CR-2003-211828
AIAA Paper 2000-0236
NAS 1.26:211828
E-13521 |
| 権利 | No Copyright |
|
