Experimental investigation of V-gutter flameholders

Umyshev, Dias R.; Dostiyarov, Abay; Tumanov, Musagul Y.; Wang, Qiuwang

doi:10.2298/tsci151209072u

Cited by 17 publications

(18 citation statements)

References 11 publications

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“…Simulations performed in [15] with a triangular-shaped bluff body (with slits on both sides) and based on experimental data obtained [8] indicate that the increasing in the angle at the corner vertex leads to increased flame stabilization. Similar results have been reported in [16,17].…”

Section: State-of-the-art: a Brief Overviewsupporting

confidence: 91%

“…It is worth mentioning, see the analysis of Lefebre [31], that this is the most important parameter of flame stabilization. In addition, the preceding study [28] revealed that the most effective way of fuel supply is at the symmetry axis directly to the recirculation zone (i. e. in the inner part of V-gutter). It is important to claim that the further results of this report are related to a rectangular combustion chamber allowing the effect of the boundary layer area to be avoided.…”

Section: Preceding Studies and The New Focus Of The Experimental Programmentioning

confidence: 96%

“…The main scientific and technical challenges address the increases in the operating efficiencies of the gas turbine bases combustion devices inasmuch as decreasing the harmful emissions is a principle task in the new century. Considering technical and economic perspectives it is acceptable to use bluff bodies or their combinations [2][3][4][5][6][7][8][9][10][11][12][13][14][15][16][17][18][19][20][21]. In this context, a considerable advantage of burners based on bluff bodies is that they can operate with various kinds of --------------fuels in a broad range of densities and viscosities such as heavy petroleum-based gases or light natural gases or various gas mixtures with hydrogen [6].…”

Section: State-of-the-art: a Brief Overviewmentioning

confidence: 99%

“…The results presented in this articles are motivated by the broad spectrum of results developed in previous experimental reports [16,17,[27][28][29][30]. Precisely, the study focuses on a grid consisting of a group of corner flame holders of the same type and its effect on the combustion process performance.…”

Section: State-of-the-art: a Brief Overviewmentioning

confidence: 99%

“…In our previous study [28] we used single V-gutters allowing the blockage ratio to be B = 0.05, fig. 1, with different supply types.…”

Section: Preceding Studies and The New Focus Of The Experimental Programmentioning

confidence: 99%

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Effects of different fuel supply types on combustion characteristics behind group of V-gutter flame holders: Experimental and numerical study

et al. 2020

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Experiments on fuel effects flame stabilization processes, NOx generation and temperature at combustion chamber outlet when using a group of three V-gutter flame holders have been reported. Fuel supply directly to the re-circulation zone on the inside of the V-gutter (type A fuel supply), and alternatively in the second type, fuel was supplied to the V-gutter symmetry axis on the outside (type B fuel supply have been carried out.

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Section: State-of-the-art: a Brief Overviewsupporting

confidence: 91%

Section: Preceding Studies and The New Focus Of The Experimental Programmentioning

confidence: 96%

Section: State-of-the-art: a Brief Overviewmentioning

confidence: 99%

Section: State-of-the-art: a Brief Overviewmentioning

confidence: 99%

“…In our previous study [28] we used single V-gutters allowing the blockage ratio to be B = 0.05, fig. 1, with different supply types.…”

Section: Preceding Studies and The New Focus Of The Experimental Programmentioning

confidence: 99%

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Effects of different fuel supply types on combustion characteristics behind group of V-gutter flame holders: Experimental and numerical study

et al. 2020

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Effect of air injection mode on the performance of a novel vortex-controlled flameholder for aircraft engine

Zhang,

Li,

et al. 2025

Applied Thermal Engineering

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Unsteady dynamics in a subsonic duct flow with a bluff body

et al. 2022

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A series of reduced-order numerical simulations on a specific bluff body type (v-gutters) in a subsonic duct flow is done to assess the unsteady wake dynamics. Two of the v-gutter's geometrical parameters are varied: the v-gutter's base angle (θ) and the size of a slit (ξ) at the leading edge of the v-gutter. Five v-gutter angles are considered (θ,{degree sign} = π/6, π/4, π/3, 5π/12, π/2) and three slit sizes (ξ, mm =0,0.25,0.5) are considered only for a particular θ = [π/6]. High fluctuations in velocity and pressure are seen for the bluffest body in consideration (θ = π/2) with higher drag (cd) and total pressure loss (Δp0). On the other hand, the presence of a slit on a streamlined body (θ = π/6) tends to efficiently stabilize the wake and thus, producing almost a periodic shedding structure with lower cd and Δp0. For θ = [π/6], broadened spectra in vortex shedding are seen with a peak at [fL/u∞] ∼ 0.08. For θ {greater than or equal to} [π/4], a dominant discrete shedding frequency is seen with a gradual spectral decay. Similarly, the effects of ξ on the θ = [π/6] case produce a discrete shedding frequency instead of a broadened one, as told before. The shedding frequency increases to a maximum of [fL/u∞] ∼ 0.26 for the maximum slit size of ξ = 0.5. More insights on the shedding vortices, momentum deficit in the wake, varying energy contents in the flow field, and the dominant spatiotemporal structures are also provided.

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Experimental investigation of V-gutter flameholders

Cited by 17 publications

References 11 publications

Effects of different fuel supply types on combustion characteristics behind group of V-gutter flame holders: Experimental and numerical study

Effects of different fuel supply types on combustion characteristics behind group of V-gutter flame holders: Experimental and numerical study

Effect of air injection mode on the performance of a novel vortex-controlled flameholder for aircraft engine

Unsteady dynamics in a subsonic duct flow with a bluff body

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