Results 251 to 260 of about 819,489 (301)

The Velocity of Sound in Air

The Journal of the Acoustical Society of America, 1942
A rigorous equation is set up for the velocity of sound in gases. This is used to calculate the velocity of sound in dry air at standard conditions from data taken in independent measurements. The result of this calculation is 331.45±0.05 meters sec.−1 An extensive survey of previous reported measurements has been made.
H. C. Hardy, D. Telfair, W. H. Pielemeier   +2 more
openaire   +1 more source

Air velocity requirement for winnowing operations

Journal of Agricultural Engineering Research, 1966
An optimum air velocity range of 800–1300 ft/min, based upon extensive experimental results, was obtained for the winnowing of paddy grains with a 1·3 ft dia fan. By feeding grains and chaff separately and comparing the combined results with those for mixtures treated similarly, it was observed that there could be no possibility of any reduction in the
M.M. Kashayap, A.C. Pandya
openaire   +1 more source

Burning velocities of hydrogen-air mixtures

Combustion and Flame, 1993
Abstract Laminar and turbulent burning velocities of hydrogen-air mixtures have been determined in a 17-L vessel using the double-kernel technique for a range of hydrogen concentrations between 9% and 70% by volume. Over the range of mixtures investigated, simple empirical correlations yield laminar burning velocities that are in good agreement with ...
G KOROLL, R KUMAR, E BOWLES
openaire   +1 more source

High Velocity Oxygen/Air Fuel Spray

International Thermal Spray Conference, 2003
Abstract According to aerodynamics and thermodynamics, High Velocity Oxygen/Air Fuel Spray system was successfully developed. The system introduced stream atomization, high-pressure combustion chamber, converging/diverging nozzle, spark plug ignition, radial powder injection with reliable operation. The system has the function of both of
Hangong Wang, Bailin Zha, Xunjia Su
openaire   +1 more source

Velocity of Air-Core Vortices at Hydraulic Intakes

Journal of Hydraulic Engineering, 1994
Concise equations for the tangential, radial, and axial velocities as well as the water surface profile of air-core vortices at hydraulic intakes have been derived. The equations were developed by modifying the equation for tangential velocity originally proposed by Rosenhead in 1930.
John E. Hite, Walter C. Mih
openaire   +1 more source

Measuring air velocity with a thermopile

Electrical Engineering, 1949
A NEW-TYPE anemometer has been developed which allows velocities as low as five feet per minute to be determined as accurately as the higher velocities. It operates by placing a heated thermopile in an air stream whose velocity is to be measured. The flow of air past the thermopile tends to bring the thermopile wire, consisting of a succession of ...
openaire   +1 more source

Settling Velocities Of Fibers In Air.

1964
PhD ; Mechanical engineering ; University of Michigan, Horace H. Rackham School of Graduate Studies ; http://deepblue.lib.umich.edu/bitstream/2027.42/183924/2/6505898 ...
openaire   +2 more sources

Velocity of Sound in Free Air

Nature, 1948
A PREVIOUS communication1 described an oscillographic method for measuring the velocity of sound in air. Further experiments have been made during the past four years, with the aid of a grant from the Research Committee of King‘s College, Newcastle-upon-Tyne, and during 1947 a series of 940 determinations was made in the Bute Hall of the University of ...
openaire   +1 more source

Air Shock Wave Velocities over Water

The Journal of the Acoustical Society of America, 1949
A procedure was devised for determining the air blast pressures of the A-bomb at Bikini. In such a disturbance the air particles move with large and finite amplitudes; hence, the propagated waves do not obey the ordinary laws of acoustics. By measuring the ratio of the air shock wave velocity to normal acoustic velocity, an indication may be obtained ...
openaire   +1 more source

Velocity of Radio Waves in Air

Physical Review, 1939
A. L. Vitter, L. C. Brieger
openaire   +2 more sources