Control of airflow about a high energy laser turret.
Mandigo, Alan Michael
Fuhs, Allen E.
MetadataShow full item record
A high energy laser system inflicts damage on a target by radiating large amounts of thermal energy onto a small area. Airflow about the laser turret, which is located on top of the aircraft fuselage, is unsteady and causes problems in beam control. The problems are jitter, which is vibration of the laser beam, and optical path distortions. The theory of flow around a cylinder and around a sphere was examined, and several airflow control techniques were screened in an effort to suppress the unsteadiness of the flow. A fairing and turret base suction apparatus was selected and experimentally tested in a wind tunnel. During the course of the experiments several parameters were varied as follows: blower flow rate, spacing between turret and fairing nosepiece, and flow rate in five separate ducts. Results of the tests indicate that the fairing and base suction technique eliminates the unsteadiness. Further research and testing are required to develop the technique for actual use on aircraft.
RightsThis publication is a work of the U.S. Government as defined in Title 17, United States Code, Section 101. Copyright protection is not available for this work in the United States.
NPS Report NumberNPS 67-80-019
Showing items related by title, author, creator and subject.
Burd, James Edward (Monterey, California. Naval Postgraduate School, 1981-12);The Department of Defense is concerned with the viability of an airborne high energy laser system. The laser is housed in a blunt turret atop a NKC-135 aircraft. Turbulence generated by flow separation around the turret ...
Fuhs, A.E.; Fuhs, S.E. (1980-04);Analytical models for optical phase distortion due to compressible flow over a laser turret are developed. Phase distortion is calculated for both blunt and small perturbation turrets. For the blunt turret, the Janzen-Rayleigh ...
Blanchard, Robert D. (Monterey, California: Naval Postgraduate School, 2013-09);The objective of this thesis is to evaluate a modeling and simulation tool for the analysis of the Trident II D5 missile nose fairing to determine the limitations of serviceability through the extended service life of the ...