Particle image velocimetry for combustion measurements: Applications and developments

Chen, Fang; Li, Hong

doi:10.1016/j.cja.2018.05.010

Cited by 31 publications

(13 citation statements)

References 84 publications

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“…Therefore, ceramic materials (e.g., TiO 2 , SiO 2 , ZrO 2 , Al 2 O 3 ) with significantly higher melting points are preferable [40]. A refractive index as high as possible and a low density that leads to a short relaxation time (low influence of inertia) are also criteria for particle selection [41,42]. In addition to any considerations of the particles, a distinction has to be made between continuous and pulsed lasers.…”

Section: Measurement and Model Validationmentioning

confidence: 99%

Material Treatment in the Pulsation Reactor—From Flame Spray Pyrolysis to Industrial Scale

et al. 2022

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Current challenges in the areas of health care, environmental protection, and, especially, the mobility transition have introduced a wide range of applications for specialized high-performance materials. Hence, this paper presents a novel approach for designing materials with flame spray pyrolysis on a lab scale and transferring the synthesis to the pulsation reactor for mass production while preserving the advantageous material properties of small particle sizes and highly specific surface areas. A proof of concept is delivered for zirconia and silica via empirical studies. Furthermore, an interdisciplinary approach is introduced to model the processes in a pulsation reactor in general and for single material particles specifically. Finally, facilities for laboratory investigations and pulsation reactor testing in an industrial environment are presented.

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Section: Measurement and Model Validationmentioning

confidence: 99%

Material Treatment in the Pulsation Reactor—From Flame Spray Pyrolysis to Industrial Scale

et al. 2022

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“…The changes of fluid dynamic features caused by combustion were studied using laser Doppler velocimetry (LDV), and the properties of the turbulent flow and their dependence on Reynolds number, swirl number, and chemical reactions were discussed [22]. As well, Chen and Liu [29] have introduced the application of PIV for this purpose and discussed its limitations in measuring the reacting flow field in combustion chambers. It showed that the flow field in the primary zone was different between the nonreacting flow field and the reacting flow field.…”

Section: Introductionmentioning

confidence: 99%

Experimental Investigation on Flow Characteristics of a Reverse-Flow Combustor

et al. 2022

International Journal of Aerospace Engineering

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Reverse-flow combustor is widely used for small engines to overcome high speed shaft whirling problem and to provide a low frontal area. An experimental investigation was carried out to research the flow field characteristics of a reverse-flow combustor in this paper. Different aerodynamic conditions were studied using PIV to reveal the characteristics of both the nonreacting and reacting flow fields. The structure of the nonreacting flow field in the central section shows similarity as the total pressure loss coefficient increases. The penetrating depth, jet angle, recirculation zone position, and the flow streamlines are similar, while the velocity value of the flow field increases. The structure of the reacting flow field on the central section is different from that of nonreacting flow field, but the variation trend of the reacting flow field under different pressure loss coefficient is similar to that of the nonreacting flow field. By examining the nonreacting and reacting flow fields under the same total pressure loss conditions, marked differences were observed in the primary zone close to the swirler outlet. The relative motion between fuel injection, airflow, and combustion affects the flow field in this zone. The velocity with combustion is faster than that of the nonreacting flow because of the increased temperature and heat release.

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“…Flame macrostructureFlame shapes are vital in predicting combustion behavior and instability. Particle image velocimetry (PIV) is among the most used techniques for flame visualization where OH* chemiluminescence is employed for evaluating the flame structure, reaction characteristics, heat release rates, and so forth 69,70. Thus, here the numerical flame shapes are also represented by the contours of OH radicals.…”

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confidence: 99%

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

Haque

Nemitallah

Abdelhafez

et al. 2022

Intl J of Energy Research

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Premixed oxy-combustion flames of methane, syngas (CH 4 :CO:H 2 with the molar ratio of 2:1:1), and propane in CO 2 -diluted environment (for carbon capture) are examined in a swirl-stabilized combustor using large eddy simulations (LES) in three-dimensional (3-D) domain. The flame and emission characteristics are examined for the different fuels over a range of equivalence ratios (Φ: 0.34, 0.39, and 0.42), at 60% oxygen fraction (OF), and 2.5 m/s bulk inlet velocity under atmospheric conditions. The results indicate increments in several characteristic parameters that are of special importance for gas turbine combustion applications, including adiabatic flame temperature (T ad ), laminar flame speed (LFS), power density (PD), product formation rate (PFR), Damköhler number (Da), and CO emission, with the increase of Φ whatever the type of fuel. Alternatively, flame thickness (δ) decreases with the increase in Φ for the three fuels. Characteristic "V" shape with almost identical outer recirculation zone (ORZ) is also observed for the three fuels. Among the studied fuels, oxy-methane flames demonstrate highest flame thicknesses, least uniform temperature distribution (highest pattern factor) at combustor outlet, and lowest CO emission level. Oxy-syngas flames show more uniform temperature distribution (lowest pattern factor) at combustor outlet and highest CO emission as compared with the oxy-methane and oxy-propane flames. The oxy-propane flames have higher values of T ad , LFS, PD, PFR, Da, and thermal power (TP) along with lowest flame thickness compared with methane and syngas counterparts. Highlights• Increasing equivalence ratio improves the flame characteristics but increases CO emission.• Fuel type has insignificant effects on shape/size of the outer recirculation zone (ORZ).• Oxy-methane flames showed highest flame thicknesses and pattern factor and lowest CO.

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Particle image velocimetry for combustion measurements: Applications and developments

Cited by 31 publications

References 84 publications

Material Treatment in the Pulsation Reactor—From Flame Spray Pyrolysis to Industrial Scale

Material Treatment in the Pulsation Reactor—From Flame Spray Pyrolysis to Industrial Scale

Experimental Investigation on Flow Characteristics of a Reverse-Flow Combustor

Analysis of methane, propane, and syngas oxy‐flames in a fuel‐flex gas turbine combustor for carbon capture

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