Citation
Abstract
Analytically computed predictions of the performance of the 64-m-diameter antenna in the wind environment have been uncertain because (1) The final design change in the porosity of the paraboloid markedly altered the similarity between the prototype and the wind tunnel models used at the preliminary design period and (2) the force values computed from static pressure taps in porous plates were doubtful. This report describes an effort to establish a correlation factor between the analytical model and the prototype using as a primary basis the field-measured azimuth torques of the 64-m antenna. A tentative conclusion is made that the maximum azimuth torque at 130-deg yaw angle computed from the static pressure taps of wind tunnel models using a full 50% reduction in forces to account for the 50% porosity must be increased 40%.
Details
- Volume
- XV
- Published
- June 15, 1973
- Pages
- 96–101
- File Size
- 492.3 KB