Low-Speed Vortical Flow over a 5-Degree Cone with Tip Geometry Variations 881422
An experiment was conducted to measure the surface pressures and sectional side forces on a 5° cone with three nose tips. The nose tips included a sharp, an 8.7% blunt, and a 17.5% blunt nose tip. Rings of pressure orifices were located at 40% and 80% of the model length and the model was rolled from ±180° in 9° increments to determine roll dependence. The sectional side force data for the sharp cone showed a strong dependence on the roll orientation of the model. The blunt nose cone configurations also showed a dependence on roll orientation. The blunt nose configurations were effective in reducing the sectional side force for angles of attack up to 25°. However, at angles of attack greater than 35°, the reduction was no longer significant. Pressure distributions for three angles of attack are presented to highlight details of the flow when: vortex asymmetries are just beginning; the vortices are in a steady asymmetric state; a vortex has shed between the 40% and 80% stations.
Citation: Chu, J., Hall, R., and Kjelgaard, S., "Low-Speed Vortical Flow over a 5-Degree Cone with Tip Geometry Variations," SAE Technical Paper 881422, 1988, https://doi.org/10.4271/881422. Download Citation
Author(s):
J. Chu, R. M. Hall, S. O. Kjelgaard
Affiliated:
NASA Langley Research Center Hampton, VA
Pages: 12
Event:
Aerospace Technology Conference and Exposition
ISSN:
0148-7191
e-ISSN:
2688-3627
Also in:
Advanced Aerospace Aerodynamics-SP-0757
Related Topics:
Roll
Pressure
Logistics
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