Experimental study of flow dynamics and fuel spray characteristics in Lean Premixed Prevaporized Combustor

Yan, Yan; Longfei, Dang; Deng, Yangbo; Li, Jinghua; Zhao, Jianxing

doi:10.1016/j.fuel.2014.12.048

Cited by 24 publications

(6 citation statements)

References 12 publications

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“…PIV is a noncontact measurement technique which offers full-field measurements without significant flow-field interference. Many researchers have studied combustor flow fields using PIV [15][16][17][18][19][20]. For example, the swirling flow inside a rectangular-shaped chamber was studied in [19].…”

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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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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“…From this point of view, the LPP combustion [19][20][21] is the most straightforward way to achieve lean conditions by premixing the fuel and air, which meets the needs of clean power generation and lowering of emissions such as soot, CO 2 , and NOx [22]. The LPP combustion has always provided the promise of obtaining low pollutant emissions while burning liquid fuels.…”

Section: Introductionmentioning

confidence: 99%

“…In this approach, a lean condition is considered where there is a higher volume of air and a lower volume of fuel in the mix. The engines designed for lean-burning can employ higher compression ratios and thus provide a better performance, efficient fuel use and low exhaust hydrocarbon emissions than those found in conventional gasoline engines [19]. Hence it is our approach that LPP combustion with e-fuels can ensure sustainable aviation with much lower environmental impact than the replacement approach of fossil kerosene with synthetically produced e-kerosine.…”

Section: Introductionmentioning

confidence: 99%

Kinetic Modeling Study on the Combustion Characterization of Synthetic C3 and C4 Alcohols for Lean Premixed Prevaporized Combustion

et al. 2021

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To reach sustainable aviation, one approach is to use electro-fuels (e-fuels) within the gas turbine engines. E-fuels are CO2-neutral synthetic fuels which are produced employing electrical energy generated from renewable resources, where the carbon is taken out of the atmosphere or from biomass. Our approach is, to find e-fuels, which can be utilized in the lean premixed prevaporized (LPP) combustion, where most of the non-CO2 emissions are prevented. One of the suitable e-fuel classes is alcohols with a low number of carbons. In this work, the autoignition properties of propanol isomers and butanol isomers as e-fuels were investigated in a high-pressure shock tube (HPST) at temperatures from 1200 to 1500 K, the pressure of 10 bar, and lean fuel-air conditions. Additional investigations on the low-temperature oxidation and flame speed of C3 and C4 alcohols from the literature were employed to develop a comprehensive mechanism for the prediction of ignition delay time (IDT) and laminar burning velocity (LBV) of the above-mentioned fuels. A numerical model based on newly developed chemical kinetics was applied to further study the IDT and LBV of fuels in comparison to the Jet-A surrogate at the engine-related conditions along with the emissions prediction of the model at lean fuel-air conditions.

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“…In the case of MT combustors, these potential problems would be extremely serious due to the compactness and small thickness of combustor walls making it necessary to be carefully managed and considered in design of a novel combustor. The design of air staging technique [15], swirl intensity [16], spray characteristics [17], and equivalence ratio [18] is necessary for proper combustion of the whatever the fuel and to maintain the emission standards, performance, and operability over the entire range of energy desires [19]. All the above considerations make it necessary to carefully redesign the new combustor parts including swirler, nozzle, liner and casing for any new fuels or operational objectives.…”

Section: Introductionmentioning

confidence: 99%

Design, manufacture and test of a micro-turbine renewable energy combustor

Bazooyar

Darabkhani

2020

Energy Conversion and Management

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The ever-increasing demand on highly efficient decentralized power generation with low CO2 emission has made microturbines for power generation in micro-combined heat and power (mCHP) generation systems popular when running on biofuels as a renewable source of energy. This document presents a state-of-the-art design, and optimization (in terms of design, performance and emission control) of a micro-turbine renewable energy combustor that fits into the existing Bladon 12kWe recuperated microturbine plenum while running on a range of biofuels as it can successfully provide the required power of the mCHP. Governing equations for in-depth analysis of the combustor consist of manufacturer empirical data to simulate system-level operation with respect to replacement of the fossil with biofuels. The Model developed and validated at company's ISO conditions confirms the output power of the new combustor fits the conventional system with slight eco-energy improvements. The modeling of the combustor in a complete microturbine assembly system is performed, then was utilized to further analysis of the microturbine with the designed combustor. The experimental results gave on average 46.7% electrical efficiency, 83.2% system efficiency, 12 kWe electrical power, and 90% recuperator effectiveness at nominal operating conditions of microturbine (MT). Sensitivity analyses evaluate changes in performance with respect to fuel phase (e.g., liquid or gaseous) and design variables (e.g., orientation, shape, and dimensions of combustor), leading to energy optimization of the unit.Experimental findings demonstrate that the combustor in microturbine can meet the target performance specifications of a company conventional diesel microturbine with significant savings. An objective function including both combustor and recuperator technical energy data is defined for finding the best ratio of fuel and air and their flow rates to find the most effective operating points for the operation of MT. Annual time series simulations completed for Coventry, West Midlands, United Kingdom indicate a new combustor can reduce operational costs of diesel 3 fuel combustor by 8%, 2%, 36%, and 25% when supplying bioethanol, DME, biogas, and NG, respectively. Annual operating time of the renewable microturbine combustor at rated capacity included an 11% reduction in exergy loss with biogas fuel relative to diesel fuel.

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Experimental study of flow dynamics and fuel spray characteristics in Lean Premixed Prevaporized Combustor

Cited by 24 publications

References 12 publications

Experimental Investigation on Flow Characteristics of a Reverse-Flow Combustor

Experimental Investigation on Flow Characteristics of a Reverse-Flow Combustor

Kinetic Modeling Study on the Combustion Characterization of Synthetic C3 and C4 Alcohols for Lean Premixed Prevaporized Combustion

Design, manufacture and test of a micro-turbine renewable energy combustor

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