Essay about Micro combustable

Summer time Undergraduate Analysis Grant intended for Excellence 2012

Indian Institute of Technology Kanpur

PROJECT REPORT

Numerical Studies of Microcombustion within a Micro-channel

Submitted by

Rishav Garg

Undergrad student

Department of Physical Engineering

IIT Kanpur

Within the guidance of

Dr . D. P. Mishra

Professor

Office of Tail wind Engineering

IIT Kanpur

thirteenth July, 2012

ABSTRACT

Numerical Studies of Microcombustion in a Micro-channel

There are a great number of methods that converts chemical energy to thermal energy like energy cells. Although combustion is the central one to obtain thermal strength from various fuels including hydrogen, natural gas, fuel natural oils because of its even more energy end result. Microcombustion is actually a potential energy source for little devices like unmanned cars and micro satellites. It is to be completed in a miniature device named Microcombustor which can be typical of 1mm size. Flame termination is the biggest disadvantage of Microcombustion as high temperature losses become more important for smaller weighing scales. So to be able to maintain the balance between heat generated and heat dropped through a Microcombustor, properly designed Microcombustor with suitable energy has to be used. In the recommended research work, two dimensional numerical models pertaining to momentum, heat, and mass transport are used to simulate the combustion techniques. Equations happen to be solved numerically using the commercial software PROGRESSIVE. An annular Microcombustor found suitable for hydrogen fuel combustable in the existence for heat losses have been used. Its suitability continues to be investigated to get a commonly readily available fuel methane gas and further it has been investigated for methane-hydrogen blends with different conditions of heat losses in wall boundaries and different inlet velocities. If such a little and dependable combustor is usually developed then it could be employed in many equipment such as turbines, compressors, pushes and several additional electrical equipment etc . This will help in functional flexibility and cutting costs.

Items

1 . Launch

2 . Annular Microcombustor

3. Research Equipment and Technique

4. Study

4. you Hydrogen-Air Burning

4. 1 . 1 Working Parameters

four. 1 . 2 Reaction Engaged

4. 1 ) 3 Benefits

4. 1 ) 4 Debate

4. 2 Methane-Air Combustion

4. 2 . 1 Working Parameters

5. 2 . several Results

4. 2 . 5 Discussion

four. 2 . 5 Discussion

4. 3 Combustion of Mixture of Methane and Hydrogen

4. 3. you Operating Parameters

4. several. 2 Reactions Involved

5. 3. three or more Results

some. 3. 4 Discussion

a few. Acknowledgements

six. References

1 . Introduction

Microcombustion is a potential energy source intended for small devices like unmanned air automobiles, consumer electronics and microsatellites. Fire extinction as a result of heat losses is the biggest disadvantage of employing Microcombustion in practice. Heat losses become significant at tiny length weighing machines (typical Microcombustor diameter is usually on the order of 1mm) because the percentage of heat shed to heat generated in combustion is inversely proportional to microcombustor diameter. Basically, it is difficult to keep up balance between heat produced in combustion and temperature lost on the surface of Microcombustor walls.

Ingenious design and style that can prevent heat losses from fire and use of hydrogen while fuel, are two of the possible ways in which Microcombustion may be improved. Hydrogen is more dynamic than hydrocarbon fuels commonly used and is likewise flammable in air in a wide range of compositions. It also decreases the air pollution potential by reducing NO and other pollutants. Low volumetric energy (need significant high-pressure tanks) and safety issued on the other hand balance these advantages. Considering these focus has now been directed to using blends of hydrogen with methane rather than either of these, with a view to mix the advantages of both the fuels. In the present analysis problem, the combustion of methane hydrogen blends within a Microcombustor continues to be investigated based on a heat loss conditions and various inlet velocities...

References: [1] S. Y. Jejurkar, D. P. Mishra, Int. M. Hydrogen Energy 35 (2010) 9755-9766.

[2] S. Con. Jejurkar, D. P. Mishra, App. Therm. Eng. 31 (2011) 521-527.

[3] Erjiang Hu, Zuohua Huang*, Jiajia He, Chun Jin, Jianjun Zheng, Int. J. Hydrogen Energy 34

(2009) 4876 – 4888

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