Investigation of temperature profile and temperature stability of micro diffusion flame under the influence of magnetic field by use of a holo-shear lens-based interferometer

Kumar, Varun; Rastogi, Vivek; Agarwal, Shilpi; Shakher, Chandra

doi:10.1117/1.oe.59.6.064107

Cited by 17 publications

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“…Many studies have been conducted, investigating how the flame behavior is influenced by magnetic fields by using different measurement methods [3][4][5][6][7][8][9][10]. These results demonstrate that magnetic fields can significantly change flame structure [5][6][7][8][9][10][11][12][13][14], flame temperature [8,10,[15][16][17][18][19][20], free radical distribution [21][22][23][24], flame stability [25,26] and CO/NO x /soot emissions as well [6,10,14].…”

Section: Introductionmentioning

confidence: 93%

Combustion Characteristics of Small Laminar Flames in an Upward Decreasing Magnetic Field

et al. 2021

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The combustion characteristics of laminar biogas premixed and diffusion flames in the presence of upward decreasing magnetic fields have been investigated in this study. The mechanism of magnet–flame interaction in the literature, in which magnetic fields change the behaviors of laminar flames due to the paramagnetic and diamagnetic properties of the constituent gases, is examined and the results are as follows. The magnetic field has no noticeable effect on premixed flames due to low oxygen concentration of the mixed gas at the injection and the relatively high flow momentum. However, due to the diffusion nature of diffusion flames and paramagnetic property of oxygen in ambient air, oxygen distributions are subjected to the gradient of magnetic flux, thus shortening the height of diffusion flames. Results also show that the flame volume is more strongly varied than flame height. Altered oxygen distributions result in improved combustion and higher flame temperature. In the case of current magnet–flame interaction, the magnetic driving force is combined with gravitational force, and a modified gravity g* as well as gravity modification factor G are derived to characterize the paramagnetism theory of oxygen.

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Section: Introductionmentioning

confidence: 93%

Combustion Characteristics of Small Laminar Flames in an Upward Decreasing Magnetic Field

et al. 2021

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“…For instance, the spin orientation of hydrogen can influence molecular behavior, and magnetic fields can alter this spin orientation. Additionally, magnetic fields can influence thermodynamic factors like binding energy and enthalpy, thereby directing fuel consumption [10][11][12][13][14].…”

Section: Introductionmentioning

confidence: 99%

A review of magnetic field assisted combustion

Öztürk,

Taştan

2024

International Journal of Energy Studies

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Since the early 1980s, research on magnetically enhanced combustion has garnered significant attention and importance. These studies have primarily focused on investigating the influence of magnetic fields on the combustion process of fuels. During this period, studies that highlighted the potential to alter molecular structures and properties through powerful magnetic fields emerged as significant contributors to the field. Simultaneously, the effects of magnetic fields on flame formation, behavior, and propagation have been thoroughly explored through various combustion models and experiments. The significance of these investigations lies in their contribution to a better understanding of the effects of combustion on energy efficiency and emission profiles. The capability of strong magnetic fields to modify molecular arrangements can enhance fuel atomization, promoting the creation of a more homogeneous fuel-air mixture. Additionally, the potential of magnetic fields to influence the reaction rates and behavior of gas molecules holds promise for achieving improved combustion and reduced emission production. Investigations have also focused on how chemical reactions of fuels are altered under magnetic fields and how these changes translate into motor performance. Specifically, research has highlighted how chain reactions such as gas combustion and explosion can be altered under magnetic fields, potentially reducing the production of harmful emissions like carbon monoxide, hydrocarbons, and nitrogen oxides. In this context, a comprehensive exploration of various aspects such as flame formation, engine performance, emissions, and explosion intensity under the influence of magnetic fields is of paramount importance. Future endeavors can potentially yield a more profound and precise understanding of the effects of magnetic fields on combustion processes and enable the utilization of this knowledge for more efficient and cleaner energy production across different industrial applications.

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“…Furthermore, several optical interferometric methods such as classical interferometry [5,6,35,36], holographic interferometry [22][23][24]37], moiré deflectometry [38], speckle shearing interferometry [39], shearing interferometry [40,41], Talbot interferometry (TI) [42,43], Lau phase interferometry (LPI) [44], digital speckle pattern interferometry (DSPI) [45], holo-shear lens based lateral shear interferometry [46][47][48], and DHI [49][50][51][52][53][54][55][56][57][58] have been investigated to measure the temperature field inside the axi-symmetric gaseous flames and transparent hot objects. TI, Moiré deflectometry, lateral shear interferometry, and holo-shear lens-based interferometry are common path interferometric methods and hence these methods are relatively less sensitive to vibrations or external perturbations as compared to speckle shearing interferometry, HI, and DHI.…”

Section: Introductionmentioning

confidence: 99%

Applications of Digital Holographic Interferometry in Heat Transfer Measurements from Heated Industrial Objects

Kumar¹,

Shakher²

2023

Holography - Recent Advances and Applications

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Digital holographic interferometry (DHI) is used worldwide for many scientific and industrial applications. In DHI, two digital holograms; one in the reference/ambient state of the object and another in changed state of object are recorded by electronic imaging sensors (such as CCD/CMOS) as reference holograms and object holograms, respectively. Phase of object wavefronts in different states of the object is numerically reconstructed from digital holograms. The interference phase is reconstructed by subtracting the phase of reference hologram from the phase of object hologram, without performing any phase-shifting interferometry. Thus, no extra effort is needed in DHI for calculating the interference phase. Apart from direct reconstruction of interference phase from two digital holograms, the recent development, availability of recording devices at video rate, and high-performance computers make the measurements faster, reliable, robust, and even real-time. In this chapter, DHI is presented for the investigation of temperature distribution and heat transfer parameters such as natural convective heat transfer coefficient and local heat flux around the surface of industrial heated objects such as cylindrical wires and heat sinks.

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Investigation of temperature profile and temperature stability of micro diffusion flame under the influence of magnetic field by use of a holo-shear lens-based interferometer

Cited by 17 publications

References 0 publications

Combustion Characteristics of Small Laminar Flames in an Upward Decreasing Magnetic Field

Combustion Characteristics of Small Laminar Flames in an Upward Decreasing Magnetic Field

A review of magnetic field assisted combustion

Applications of Digital Holographic Interferometry in Heat Transfer Measurements from Heated Industrial Objects

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