Combustion research needs for helping development of next-generation advanced combustors

Mongia, H. C.; Gore, J. P.; Grinstein, Fernando F.; Gutmark, Ephraim; Jeng, San‐Mou; McDonell, Vince; Menon, Suresh; Samuelsen, G. S.; Santavicca, Domenic A.; Santoro, Robert J.

doi:10.2514/6.2001-3853

Cited by 14 publications

(4 citation statements)

References 4 publications

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“…Recently, the trapped vortex combustion technology is chosen as an alternative method of creating recirculation zones in a high inlet velocity stream of combustion mixture, which had been gained more attention and may be the next generation combustion technology. 2 Due to its excellent performance characteristics, researchers have carried out a lot of study to investigate the combustion performance and flow structure in recent years. [3][4][5][6] Stone et al 7 have investigated the influence of inlet velocity on the intensity of turbulent and the ratio of air and oil.…”

Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on the influence of pneumatic parameters on the flow structure in trapped vortex combustor

Tan¹,

Chen

Jia³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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Flow field of combustors have been commonly used to help understand the combustion characteristics. In this study, the experimental and numerical investigation was carried out combined to study the effect of pneumatic parameters, such as the main stream Mach number, pressure ratio, and temperature, on the flow structure in a trapped vortex combustor This study aimed to investigate the influence of pneumatic parameters on the vortex center position and area of primary and secondary vortices in the cavity, and also study the distribution of axial and radial velocity in the cavity obtained by changing the inlet airflow temperature. The flow fields in the combustor cavity with the variation of main stream Mach number and pressure ratio were obtained by using Particle Image Velocimetry The results show that, a double-vortex pattern can be generated and tightly locked inside the cavity. Furthermore, the flow structure is significantly influenced by pressure ratio ( rp = 0.97–1.07) instead of mainstream Mach number (Ma = 0.13–0.17). Under the same Mach number, the location of vortex center in the main stream plane is moved with the appearance of the temperature gradient. Meanwhile, the velocity profiles indicate that the axial velocity is reduced as the temperature increase. This study provides a design guideline for combustion with the main stream and second stream, and also offers important reference value for the analysis of combustion performance in cavity.

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Section: Introductionmentioning

confidence: 99%

Experimental and numerical study on the influence of pneumatic parameters on the flow structure in trapped vortex combustor

Tan¹,

Chen

Jia³

et al. 2022

Proceedings of the Institution of Mechanical Engineers, Part A:

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“…[5][6][7][8]. Mongia [9] studied the downstream spray field of a swirl cup combustor using PLIF technology and the results showed that venturi can control the area of fuel distribution, and form a typical cone distribution. Hadef [10] researched the effect of co-and counter-swirl on the atomization characteristics, which indicated that it was better and more spatially dispersed when using the counter-swirl.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Flow Field and Atomization Field Characteristics of Pre-Filming Air-Blast Atomizers

Fan

Liu

et al. 2019

Energies

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Flow field, atomization field characteristics, and liquid film breakup behaviors of a pre-filming air-blast atomizer are investigated using PIV (Particle Imaging Velocimetry), PLIF (Fuel Planar Laser Induced Fluorescence), and high-speed shadowgraph technique under different air mass rates (ma), fuel mass rates (mf), and fuel temperatures (T). The influence of structures constituting the pre-filming air-blast atomizer on the flow field organization and atomization field organization are investigated too. The results illustrate that air-blast atomizer structures have a great difference on the flow fields and atomization fields. Air-blast atomizer structures have great differences on the liquid film breakup processes too. Flow field structure and atomization structure are mainly determined by the swirler structure, whereas there are seldom influences of air mass rate and fuel mass rate on them. The results of the mechanisms of flow field organization and atomization field organization in this study can be used to support the design of new low-emission combustor.

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“…Ateshkadi et al [8] studied the effect of swirl vane angle, swirl sense and venturi on LBO performance, and a new LBO correlation model accounting for heterogeneous reaction and geometry of mixer component is developed. Ateshkadi [5] and Mongia [9] studied the downstream spray field of a swirl cup combustor using PLIF technology, the results showed that venturi can control the area of fuel distribution, and form a typical cone distribution. Hadef [10] researched the effect of co-and counter-swirl on the droplet characteristics.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigations of Effects of Venturi Angle on the Spray Structure

Fan¹,

Liu²,

Wang³

et al. 2019

Proceedings of Global Power &Amp; Propulsion Society

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In this paper, the spray characteristics of a double-swirl low-emission combustor are analysed by using PIV and PLIF technologies in an optical three-sector combustor test rig. The interactions between sectors and the influence of venturi angle on spray structure are explained. The results illustrate that the flow field plays a decisive role in the forming of spray structure. The interactions between sectors make the differences of flow field and spray structure between sectors. The venturi angle has a great influence on the spray structure and interactions between sectors. In a word, the results of the mechanism of spray organization in this study can be used to support the design of new low-emission combustor.

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Combustion research needs for helping development of next-generation advanced combustors

Cited by 14 publications

References 4 publications

Experimental and numerical study on the influence of pneumatic parameters on the flow structure in trapped vortex combustor

Experimental and numerical study on the influence of pneumatic parameters on the flow structure in trapped vortex combustor

Experimental Investigations of Flow Field and Atomization Field Characteristics of Pre-Filming Air-Blast Atomizers

Experimental Investigations of Effects of Venturi Angle on the Spray Structure

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