Opposed Flow Diffusion Flame
Opposed Flow Diffusion Flame - Related Videos
10:29
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Cited by 14 •
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07:27
Metal Flame Emission - Student Protocol
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2020
Source: Smaa Koraym at Johns Hopkins University, MD, USA Metal Flame Emission TestingExpand In this lab, you will excite the electrons of six metal chloride salts with heat from a flame and measure the wavelength of light emitted by the relaxing electrons. The emitted light is in the visible spectrum, so you will see different colored flames for the different metals. At the end of the lab, you will measure the emission spectrum of a sparkler and use the data you collected from the metal...
02:47
Metal Flame Emission - Concepts
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2020
Metal Flame Emission Flame testing is an analytical technique where a sample is placed in a flame, and the characteristic flame color is used to identify the substance. Each element has a characteristic light emission when placed into a flame, meaning each element produces a unique color. This phenomenon is used in fireworks displays, where the color of the fireworks corresponds to a specific characteristic of a metal. The emission of colored light from a burning sample is the direct result of...
02:31
Diffuse Correlation Spectroscopy to Assess Cerebral Blood Flow in a Mouse Model
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FAQs
Flow strain rate changes how rapidly the opposing streams approach the stagnation plane, influencing the flame’s temperature, internal structure, and stability. As this rate changes, the balance between transport and chemical reaction also changes, making it possible to examine conditions under which the flame remains established or approaches extinction in a controlled laboratory configuration.
The stagnation plane provides a well-defined region where the opposing fuel and oxidizer streams slow their axial motion as they approach one another. Molecular diffusion carries each reactant toward the reaction zone near this region. Its predictable location and geometry help engineers relate observed flame behavior to transport, reaction processes, and computational simulations.
Separate fuel and oxidizer streams allow engineers to investigate combustion without first mixing the reactants. This arrangement isolates the effects of molecular diffusion and flow conditions on the reaction zone, while the controlled geometry supports systematic comparisons. It is therefore valuable for examining fundamental flame behavior rather than relying only on conditions found in complex combustion devices.
A typical arrangement requires opposing streams of fuel and oxidizer directed toward a common stagnation region, where the reaction zone develops. Engineers control the flow configuration and observe how the resulting flame responds, particularly in temperature, structure, and stability. The well-defined geometry makes the setup suitable for controlled laboratory measurements and comparison with simulations.
Engineers use this configuration when they need controlled conditions for examining how a flame starts, persists, or disappears. By studying the flame as operating conditions and flow strain rate influence its structure and stability, researchers can investigate ignition and extinction without the added complexity of a full combustion system. These observations help evaluate combustion behavior systematically.
The setup can support studies of chemical kinetics, pollutant formation, and the behavior of different fuels or reaction mechanisms. Its controlled geometry also enables direct comparison between experiments and simulations. These results help engineers assess combustion strategies and determine how changes in fuel, chemistry, or operating conditions influence flame temperature, structure, and stability.