Simultaneous measurements of multiple flow parameters for scramjet characterization using tunable diode-laser sensors

Li, Fēi; Yu, Xilong; Gu, Hongbin; Li, Zhi; Zhao, Yan; Ma, Lin; Chen, Lihong; Chang, Xinyu

doi:10.1364/ao.50.006697

Cited by 84 publications

(35 citation statements)

References 37 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…13, the averaged Mach number along the engine duct is above one. Furthermore, the tunable diode laser absorption spectrum (TDLAS) [30] was implemented at the isolator (x 0.2 in Fig. 13), combustor (x 0.8), and nozzle (x 1.54).…”

Section: Supersonic Combustion Modementioning

confidence: 99%

Quasi-One-Dimensional Multimodes Analysis for Dual-Mode Scramjet

Tian

陈立红

陈强

et al. 2014

Journal of Propulsion and Power

Self Cite

View full text Add to dashboard Cite

A quasi-one-dimensional analytical method with a novel model for precombustion shock train has been proposed to model different modes in the dual-mode scramjet flowfield. The interaction between shock and combustion is modeled by a strength-adaptable model in the isolator, named the "X shock." An iterative procedure is implemented to solve the precombustion shock and the flow properties downstream. The calculation of the combustor is based on a series of governing equations where the effects of area change, friction, and mass injection are included. The release of energy is obtained from a fuel-mixing model or pregiven heat release distributions estimated from experimental results. The numerical results of pressure are compared with the experimental data for validation of the present model. The results show that the quasi-one-dimesional method can be applied to analyze diverse modes in the whole process of the dualmode scramjet combustor. Subscripts in = conditions in the inlet of the isolator max = maximum value min = minimum value 0 = total or stagnation conditions

show abstract

Section: Supersonic Combustion Modementioning

confidence: 99%

Quasi-One-Dimensional Multimodes Analysis for Dual-Mode Scramjet

Tian

陈立红

陈强

et al. 2014

Journal of Propulsion and Power

Self Cite

View full text Add to dashboard Cite

show abstract

“…Experiments were performed in a two-dimensional combustor fueled with ethylene, with a test section of the size of 40×85 mm 2 . The detailed description of this facility and the experiments can be found in [21]. Five representative cases were examined and the results summarized in Figure 8.…”

Section: Analysis Of Experimental Datamentioning

confidence: 99%

Uncertainty Analysis of Velocity Measured by Diode-Laser Absorption Spectroscopy in a Scramjet Facility

Cai

et al. 2013

51st AIAA Aerospace Sciences Meeting Including the New Horizons Forum and Aerospace Exposition

Self Cite

View full text Add to dashboard Cite

This work investigates the error caused by non-uniformities along the line-of-sight in velocity measurement using tunable diode-laser absorption spectroscopy (TDLAS). Past work has demonstrated TDLAS as an attractive diagnostic technique for measuring velocity, which is inferred from the Doppler shift of two absorption features using two crossing laser beams. However, because TDLAS is line-of-sight in nature, the obtained velocity is a spatially-averaged value along the probing laser beams. As a result, non-uniformities in the flow can cause uncertainty in the velocity measurement. Therefore, it is the goal of this work to quantify the uncertainty caused by various non-uniformities typically encountered in practice, including boundary layer effects, the divergence/convergence of the flow, and the methods (direct absorption vs. wavelength modulation) used to fit the Doppler shift. Systematic analyses are performed to quantify the uncertainty under various conditions, and case studies are reported to illustrate the usefulness of such analysis in interpreting experimental data obtained from a scramjet facility. We expect this work to be valuable for the design and optimization of TDLAS-based velocimetry, and also for the quantitative interpretation of the measurements.

show abstract

“…The technique of TDLAS is based on the absorption spectroscopy of water vapor and the mechanism of Doppler shift. Besides, direct absorption strategy was chosen with implementing a so-called two-wavelength TDLAS 4 .…”

Section: B Facilities and Measurementsmentioning

confidence: 99%

“…3 Assistant Professor, Institute of Mechanics, CAS, email: chenqiang@imech.ac.cn. 4 Assistant Professor, Institute of Mechanics, CAS, email: feili@imech.ac.cn. 5 Professor, Institute of Mechanics, CAS, email: xychang@imech.ac.cn.…”

Section: Introductionmentioning

confidence: 99%