Experimental study of surface roughness effect on oxygen catalytic recombination

Kim, Ikhyun; Park, Gisu; Na, Jae Jeong

doi:10.1016/j.ijheatmasstransfer.2019.04.049

Cited by 34 publications

(14 citation statements)

References 23 publications

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“…In Table 5, the results of the low enthalpy shock-tube and shock-tunnel flows are summarized, showing the calculated results from the 3-T model, and the experimental data [18,20,21] for the flow conditions for Cases A to D. In the shock-tube flows for Case A and Case B, the calculated reservoir pressure p 5 agrees with the measured values, and the shock speed is also accurately reproduced by the 3-T model. In the shock-tunnel flows for Case C and Case D, the measured values of the flow enthalpy and Mach number are accurately reproduced by the 3-T model.…”

Section: Plos Onementioning

confidence: 62%

“…In addition to the 3-T model, previous 1-T and 2-T models were adopted in the Q1D flow calculations to compare the results, and to investigate the thermochemical nonequilibrium flows. For Cases A, B, and C, the calculated results for the shock-tube and shock-tunnel operation modes were compared with existing experimental data [18,20,21]. The shock-tunnel flow calculation was additionally performed for Case D, to numerically investigate the thermochemical nonequilibrium flows in the maximum available dry air gas operating condition.…”

Section: Thermochemical Nonequilibrium Analysismentioning

confidence: 99%

“…tube flow calculation, a test gas of 21% O 2 and 79% Ar was adopted, to match the shock-tube experiments performed by Kim et al [20]. Since O 2 is a single diatomic species, the calculated results using the 3-T model yielded the same results as the 2-T model.…”

Section: Plos Onementioning

confidence: 99%

“…Since O 2 is a single diatomic species, the calculated results using the 3-T model yielded the same results as the 2-T model. Fig 6(a) presents a comparison of the calculated results and experimental data [20] of the pressure at the end-wall. In the experiments [20], the pressure sensor was mounted at the end-wall, and the reflected shock condition was observed.…”

Section: Plos Onementioning

confidence: 99%

“…In the shock-tunnel flow calculation, the Q1D method was employed by dividing the flow calculations into two parts, the shock-tube and the Mach 6 nozzle. The results for the shock-tunnel flows calculated using the 3-T model were compared with existing experimental data [18,20,21] and the calculated results obtained from previous 1-T and 2-T models for various operating conditions in the K1 shock-tunnel facility.…”

Section: Introductionmentioning

confidence: 99%

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Thermochemical nonequilibrium flow analysis in low enthalpy shock-tunnel facility

et al. 2020

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A thermochemical nonequilibrium analysis was performed under the low enthalpy shocktunnel flows. A quasi-one-dimensional flow calculation was employed by dividing the flow calculations into two parts, for the shock-tube and the Mach 6 nozzle. To describe the thermochemical nonequilibrium of the low enthalpy shock-tunnel flows, a three-temperature model is proposed. The three-temperature model treats the vibrational nonequilibrium of O 2 and NO separately from the single nonequilibrium energy mode of the previous two-temperature model. In the three-temperature model, electron-electronic energies and vibrational energy of N 2 are grouped as one energy mode, and vibrational energies of O 2 , O 2 + , and NO are grouped as another energy mode. The results for the shock-tunnel flows calculated using the three-temperature model were then compared with existing experimental data and the results obtained from one-and two-temperature models, for various operating conditions of the K1 shock-tunnel facility. The results of the thermochemical nonequilibrium analysis of the low enthalpy shock-tunnel flows suggest that the nonequilibrium characteristics of N 2 and O 2 need to be treated separately. The vibrational relaxation of O 2 is much faster than that of N 2 in low enthalpy condition, and the dissociation rate of O 2 is manly influenced by the species vibrational temperature of O 2. The proposed three-temperature model is able to describe the thermochemical nonequilibrium characteristics of N 2 and O 2 behind the incident and reflected shock waves, and the rapid vibrational freezing of N 2 in nozzle expanding flows.

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Section: Plos Onementioning

confidence: 62%

Section: Thermochemical Nonequilibrium Analysismentioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Section: Plos Onementioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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