100 kHz PIV in a liquid-fueled gas turbine swirl combustor at 1 MPa

Philo, John; Frederick, Mark; Slabaugh, Carson D.

doi:10.1016/j.proci.2020.06.066

Cited by 16 publications

(2 citation statements)

References 15 publications

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“…They were able to quantify the link between the increase in laminar burning velocity and the increase in maximum pressure and maximum rate of pressure rise for hydrogen mole fraction in the fuel. During the validation of the simulations, actual experiments using laser doppler anemometry (LDA/LDV) and particle image velocimetry (PIV) are extensively used [15][16][17][18][19][20][21][22][23]. We previously reported the comparison of the LDV and PIV of cylinder optical engines in the past [24][25][26][27][28].…”

Section: Introductionmentioning

confidence: 99%

The Interaction between In-Cylinder Turbulent Flow and Flame Front Propagation in an Optical SI Engine Measured by High-Speed PIV

Ikeda¹

2022

Energies

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The relationship between the flow field and flame propagation is essential in determining the dynamics and effects of turbulent flow in an optical SI engine. In this study, high turbulence flow at stable operations was achieved using 12,000 rpm engine speed, 60 kPa absolute intake pressure, 14.7 A/F, and 15 deg. BTDC spark timing. The turbulent flow field and flame propagation interplay were analyzed through the simultaneous high-speed PIV measurements of the in-cylinder flow and flame front propagation under firing conditions. The intensity of the seeder used was optimized by changing the crank angle. Successful simultaneous detection of the flame front and turbulent flow was demonstrated. Strong turbulence was produced at the flame front simultaneously with the flame movement. After ignition timing, the flame accelerated in the unburned region, and a vital turbulence region occurred.

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Section: Introductionmentioning

confidence: 99%

The Interaction between In-Cylinder Turbulent Flow and Flame Front Propagation in an Optical SI Engine Measured by High-Speed PIV

Ikeda¹

2022

Energies

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“…These previous studies demonstrated that differences in both physical and chemical properties associated inherently with distinct liquid fuel compositions can substantially alter several combustion characteristics of the combustor. It is worth noting that, in the field of thermoacoustic instability research, although an increasing number of studies employing liquid fuels have been witnessed recently (such as refs − to list a few), to date, scarce public documents are available concerning the impacts of liquid fuel composition on combustion stability characteristics in gas turbine combustors.…”

Section: Introductionmentioning

confidence: 99%

Thermoacoustic Instability Characteristics and Flame/Flow Dynamics in a Multinozzle Lean Premixed Gas Turbine Model Combustor Operated with High Carbon Number Hydrocarbon Fuels

et al. 2021

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The impact of fuel variations on thermoacoustic instability characteristics and flame/flow dynamics in a lean premixed prevaporized, multinozzle gas turbine model combustor was experimentally investigated with high-speed particle image velocimetry (PIV) and flame OH* chemiluminescence (CL) measurements. The fuels studied included three hydrocarbons with high carbon numbers from distinct chemical classes, including n-decane (C10H24, linear alkane), iso-octane (C8H18, branched alkane), and methylcyclohexane (C7H14, MCH, cyclic alkane). When operated with these three fuels, time-resolved measurements of the unsteady flame/flow dynamics indicated that the combustion system exhibited similar sequences of periodic flame/flow dynamics; however, distinct characteristics were observed in terms of the instability frequencies and amplitudes. Under the test conditions, it was shown that the MCH flame featured the highest (421 Hz) instability frequency, which was 385 Hz for n-decane and 382 Hz for iso-octane flames. Regarding the amplitude of the instability, experimental results indicated that the instability was the strongest for the iso-octane flame (132 dB), which was followed by n-decane (129 dB) and MCH (123 dB) flames. A joint analysis between the calculated fuel fundamental kinetic properties and experimental data suggested that a higher adiabatic flame temperature could lead to a higher instability frequency, whereas the ignition delay time (IDT) and heat release rate properties of the fuels determined the amplitudes of the instabilities together. Additionally, phase-averaged sequences and spectrum and proper orthogonal decomposition (POD) analysis of the instantaneous measurements revealed that large-scale longitudinal oscillations along with side-to-side interactions of the adjacent flame roots dominated the unsteady flame/flow dynamics in this multinozzle combustor.

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High-speed planar imaging of OH radicals in turbulent flames assisted by deep learning

et al. 2022

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100 kHz PIV in a liquid-fueled gas turbine swirl combustor at 1 MPa

Cited by 16 publications

References 15 publications

The Interaction between In-Cylinder Turbulent Flow and Flame Front Propagation in an Optical SI Engine Measured by High-Speed PIV

The Interaction between In-Cylinder Turbulent Flow and Flame Front Propagation in an Optical SI Engine Measured by High-Speed PIV

Thermoacoustic Instability Characteristics and Flame/Flow Dynamics in a Multinozzle Lean Premixed Gas Turbine Model Combustor Operated with High Carbon Number Hydrocarbon Fuels

High-speed planar imaging of OH radicals in turbulent flames assisted by deep learning

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