Download or read book Thermal Warm Fog Dissipation written by Alan I. Weinstein and published by . This book was released on 1973 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climatological records of fog occurrence and wind characteristics in fog are used to design a passive ground-based heat system for the dispersal of warm fog at Travis AFB, California. The array of heat sources is patterned after that described by FIDO engineers for parallel winds. The burner array shape is similar to an elongated horseshoe that encloses the upwind end of the runway, with the parallel legs 450 ft apart terminating 240 ft short of a 700-ft-long cross leg. An analysis of air traffic records in combination with fog statistics indicates that the system could be used to aid approximately 900 (2600) landings and takeoffs in an average (extreme) year during the fog-plagued months from November to February. Assuming a burn time of five minutes per landing or takeoff, the heaters could be expected to operate approximately 75 (260) h and consume approximately eleven (48) million gallons of fuel in an average (extreme) year. During the time the system is operating it generates heat at a rate of approximately 10 billion BTU/h. (Author).

Download or read book Thermal Techniques for Dissipating Fog from Aircraft Runways written by Currie S. Downie and published by . This book was released on 1958 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal Warm Fog Dissipation written by Alan I. Weinstein and published by . This book was released on 1973 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Climatological records of fog occurrence and wind characteristics in fog are used to design a passive ground-based heat system for the dispersal of warm fog at Travis AFB, California. The array of heat sources is patterned after that described by FIDO engineers for parallel winds. The burner array shape is similar to an elongated horseshoe that encloses the upwind end of the runway, with the parallel legs 450 ft apart terminating 240 ft short of a 700-ft-long cross leg. An analysis of air traffic records in combination with fog statistics indicates that the system could be used to aid approximately 900 (2600) landings and takeoffs in an average (extreme) year during the fog-plagued months from November to February. Assuming a burn time of five minutes per landing or takeoff, the heaters could be expected to operate approximately 75 (260) h and consume approximately eleven (48) million gallons of fuel in an average (extreme) year. During the time the system is operating it generates heat at a rate of approximately 10 billion BTU/h. (Author)

Download or read book A Modern Thermo kinetic Warm Fog Dispersal System written by Bruce A. Kunkel and published by . This book was released on 1978 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: An extensive investigation has been made to arrive at optimum specifications for a thermo-kinetic warm fog dispersal system. This study included passive heat tests, sub-scale heat/momentum tests, and tests with a single full-scale runway combustor and an approach zone combustor. These tests were augmented with extensive analytical modeling of buoyant jets under coflowing and counterflowing wind conditions. The landing category and the operational requirements within each category are the primary factors affecting the size of the thermal fog dispersal system (TFDS). A Cat 2 TFDS employs 22 percent fewer combustors and uses 50 percent less fuel than a Cat 1 TFDS. The combustor specification and orientation are presented for both Cat 1 and Cat 2 systems. (Author).

Download or read book Investigation of Warm Fog Properties and Fog Modification Concepts written by James E. Jiusto and published by . This book was released on 1968 with total page 84 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fog Modification written by Bernard A. Silverman and published by . This book was released on 1973 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report is a comprehensive review of fog modification. It includes discussions of the physical structure and climatological characteristics of various types of fog. The three different methods of fog modification, that is, removal, evaporation and prevention are discussed, as are the general requirements of fog dispersal. In depth descriptions are given of the techniques used to modify supercooled, warm, and ice fog. (Author).

Download or read book Warm Fog Dissipation Heat Source Program Fort Rucker Alabama April 1969 written by E. M. Frisby and published by . This book was released on 1970 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The report gives an account of a short field program on warm-fog dissipation conducted at Fort Rucker, Alabama, in April 1969. The program objective was to establish the effective sphere of influence of the heat plume generated by two specific types of a heating unit. Results of the experiments led to the postulation of the type of equipment needed to clear a Minimum Helicopter Landing Zone of fog. The report discusses the detailed conduct of each experiment and represents an analysis of the daily observations obtained between 19 and 27 April 1969. (Author).

Download or read book Factors in Warm Fog Dissipation written by Ted S. Cress and published by . This book was released on 1970 with total page 250 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fog Dispersion written by Larry S. Christensen and published by . This book was released on 1980 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Project Fog Drops Part 1 Investigations of Warm Fog Properties written by R. J. Pilie and published by . This book was released on 1972 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Project Fog Drops Investigations of warm fog properties written by Roland J. Pilié and published by . This book was released on 1972 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Thermal and Chemical Fog Dissipation written by Bruce A. Kunkel and published by . This book was released on 1973 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt: Results of thermal and chemical fog dispersal tests, conducted by AFCRL during July 1972, are presented and discussed. Forty-three tests were conducted in fog, thirty-three of which were suitable for analysis. Ninety-six additional heat tests were conducted in clear air. Two wide-area urea seeding tests were also performed. An instrumented 200-ft tower, a lidar, and a ground network of visibility sensors and droplet sampler were used to monitor the effects of the tests on the foggy environment. The seeding tests were unsuccessful. Improper execution of the wide-area seeding pattern due to a lack of knowledge of the winds at the seeding location was responsible for the failure of the seeding tests. (Modified author abstract).

Download or read book A Numerical Simulation of Warm Fog Dissipation by Electrically Enhanced Coalescence written by Paul M. Tag and published by . This book was released on 1974 with total page 56 pages. Available in PDF, EPUB and Kindle. Book excerpt: Over the past decade, several techniques of dissipating warm fog, including heating, hygroscopic seeding, and helicopter downwash, have been proposed. Another method which involves the generation of an electric field through the fog has been suggested and tried in field experimentation. However, the mechanism responsible for visibility improvement, as a result of the electric field, is in question. (Modified author abstract).

Download or read book Investigation of Warm Fog Properties and Fog Modification Concepts written by and published by . This book was released on 1971 with total page 124 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Warm Fog Dissipation Models and Control and Processing Programs for Airborne Data System written by Russell C. Serbagi and published by . This book was released on 1974 with total page 165 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main purpose of this study was to develop a mathematical model to simulate the dissipation of warm fog by the introduction of heat at various boundary locations. By implementing this model on a large digital computer the near optimum size and location of the heat sources could be determined to effectively dissipate the fog. The report deals with the formulation of the governing equations, the finite difference equations and the problems encountered in their solution.

Download or read book Investigations of Warm Fog Properties written by and published by . This book was released on 1972 with total page 156 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Laboratory Experiments on Warm Fog Dissipation written by Michael Joseph Marchetti and published by . This book was released on 1972 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some of the more recent results of studies involving the use of hygroscopic materials and ionic surfactants as warm fog dispersants are covered in a brief survey of the literature. The fog chamber, equipment and experimental procedures used in this study are described in detail. Seeding agents used during these small-scale fog chamber experiments were limited to the use of hygroscopic materials, surfactants and ethyl alcohol. Results indicated that those hygroscopic agents tested, such as NaCl and glycerin, proved to be relatively effective warm fog dispersants compared to distilled water. The ionic and nonionic surfactants tested dissipated warm fog at approximately the same rate as distilled water and were considered ineffective. Ethyl alcohol appeared to initially increase the fog intensity, and thus, retard fog dissipation. Conductivity/Resistivity measurements and illustrations of the relative droplet sizes and shapes of the various agents used are also contained in this report. The effects on plants of four of the hygroscopic agents are also discussed and illustrated. (Author).