【摘 要】
：
Data pertaining to the burning rate of an isolated liquid fuel droplet in a turbulent flow field is scarce.In the present study,an investigation of the effect of free stream turbulence on the burning
【机 构】
：
Reserach Scholar,IIT Madras,India Associate Profe
【出 处】
：
13th International Conference on Liquid Atomization and Spra
论文部分内容阅读
Data pertaining to the burning rate of an isolated liquid fuel droplet in a turbulent flow field is scarce.In the present study,an investigation of the effect of free stream turbulence on the burning characteristics of an isolated suspended liquid fuel droplet is reported.For this purpose,free stream turbulence has been generated using grids kept in flush with a round nozzle in a low speed vertical wind tunnel.The entire flow field has been characterized using a bi-component constant temperature hot wire anemometer.The higher order moments of velocities and various scales have been estimated from the instantaneous velocity data measured at different axial locations to the extent of 16D,where D is the exit diameter of the nozzle.A thin quartz fiber is used to suspend the liquid fuel droplet at desired locations,where the mean and fluctuating components and various scales of turbulence are well established.Experiments are conducted at atmospheric conditions under normal gravity.The experimental results for an alcoholic fuel,methanol,and a hydrocarbon oil,n-heptane have been presented systematically.The burning rate is quantified based on the droplet surface regression obtained through simple backlight technique.The flame structure is investigated through direct photographs obtained with a high-definition digital camera.This study assists in the determination of the validity of well-known d2-law during the burning of a liquid fuel droplet in a controlled turbulent ambience.The mass burning rate shows an increasing trend with increasing turbulent intensity and then decreases.The flame height to width ratio remains almost constant except at high turbulent intensity.
其他文献
High-level Nitrogen oxides(NOx)released to the atmosphere cause health and environmental hazards.Conventional power plants are required to have NOx emission control systems to abide by local environme
The spectrally selective absorbing film plays a key role in determining the collecting capability of solar thermal en-ergy in the application of solar water heater.This research experimentally investi
This paper investigates the optimization conditions of the parameters of a reciprocating spray coating processes to improve the uniformity of absorptivity and emissivity distributions on a selective a
Inter-subject variability in lung morphometry could influence the transport of any disease causing microorganism to the deep lung regions and the delivery of drug to such a targeted site.This study ai
Laser cladding technology is to deposit a clad layer covering on the surface of substrate,in order to achieve enhanced corrosion and wear properties by supplying powder or wire.The quality of the gas
The motions of particles injected from two different sprayers were investigated.The present investigation deals with automotive paint sprayers,high-speed rotary bell-cup atomizer and powder spray gun.
Pulverized coal combustion across the regions of blowpipe,tuyere,and raceway of blast furnace under various operating conditions are studied numerically.Three different lance configurations,including
Spray-dried food powders often contain oil.In the liquid feed,the oily phase is emulsified to drops in the lower μm size range.Powder and rehydrated liquid product properties strongly depend on the oi
We have experimentally found rising liquid film flow and subsequent atomization for Newtonian fluid using a rotating cone.When the film flow goes up fully upward,the liquid film cannot keep the filmwi
For liquid fuels,their burning characteristics are important.Burning of an isolated droplet depends upon the heat and mass transfer from the ambience.For fuels having low boiling point,basically the m