Design and testing of an additively manufactured flameholder for scramjet flows

Lieber, Damien; Goyne, Christopher P.; Rockwell, Robert D.; Geipel, Clayton M.; Chelliah, Harsha K.

doi:10.1016/j.ast.2022.107656

Cited by 4 publications

(4 citation statements)

References 11 publications

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“…These trends and values provide the basis to validate the DNS simulations setup by comparing the coarsened DNS-generated boundary conditions to fully characterized PIV results. Additional data and further analysis are provided in Lieber [29].…”

Section: Discussion and Results On Piv Measurementsmentioning

confidence: 99%

“…Table 2 lists key flow characteristics for the test case considered in this paper estimated from previous work and CFD studies [5,27,28]. Results for all test cases can be found in Lieber [29]. The disturbances induced by the present high-speed, high-temperature flow on the above characteristics compound with disturbances from imaging at high resolutions as well as in a small ducted metal test section.…”

Section: Objectives and Contributionsmentioning

confidence: 99%

“…This study represents the highest resolution velocimetry available thus far in a high-speed compressible environment and high-speed flame, at 355 µm, allowing the broader capture of the spatial turbulent kinetic energy spectrum to prescribe accurate CFD boundary conditions. The full set of experimental results and analysis is published in Lieber [29].…”

Section: Objectives and Contributionsmentioning

confidence: 99%

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High-resolution PIV for characterization of the inflow to a cavity flameholder

Lieber

Goyne

Gibbons

2020

Meas. Sci. Technol.

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A methodology for the implementation of high-resolution, two-component, two-dimensional particle image velocimetry (PIV) in a high-speed, high-enthalpy flow is presented and demonstrated. The objective is to resolve the finer scales of combusting flows at high subsonic Mach numbers for accurate boundary conditions quantification for direct numerical simulations. A three-pronged approach consists of finding a near-optimum setup specific to the experiment, enhancing the raw signal with a novel filter for high-speed flows based on a logarithmic transform, and quantifying uncertainties. The methodology effectiveness is demonstrated with synthetic PIV, real PIV, and comparison with numerical simulations.

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Section: Discussion and Results On Piv Measurementsmentioning

confidence: 99%

Section: Objectives and Contributionsmentioning

confidence: 99%

Section: Objectives and Contributionsmentioning

confidence: 99%

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High-resolution PIV for characterization of the inflow to a cavity flameholder

Lieber

Goyne

Gibbons

2020

Meas. Sci. Technol.

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“…The University of Virginia's Supersonic Combustion Facility (UVASCF) was used to conduct this study. UVASCF is a direct-connect, electrically-heated facility designed to simulate DMSJ conditions of a vehicle traveling at approximately Mach 5 [23][24][25][26]. The stagnation temperature and pressure are maintained at 1200 K and 300 kPa, respectively.…”

Section: Methodsmentioning

confidence: 99%

Dual-mode scramjet control using optical emission sensors

Elkowitz,

Wanchek,

Rockwell

et al. 2024

Appl. Opt.

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Closed-loop fueling control of a dual-mode scramjet was successfully demonstrated using optical emission spectroscopy as the sole sensor for controller feedback. The optical emission from species of interest (OH∗, CH∗, C2∗) was first characterized throughout the combustor. The relative emission intensity between species pairs was studied over a range of fueling conditions and imaging locations throughout a dual-mode scramjet combustor flow path. The pair of emissive species (C2∗/OH∗) and imaging location that were the most sensitive to changes in fueling condition were selected for use in the control system. Changes in optical transmission of the observation windows and the impact on fuel control were explored. To our knowledge, this paper is the first demonstration of fueling control of a dual-mode scramjet using only optical emission spectroscopy as feedback.

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