Numerical study on transition structures of oblique detonations with expansion wave from finite-length cowl

Xiang, Gaoming; Gao, Xiang; Tang, Wanjun; Jie, X. Z.; Huang, Xin

doi:10.1063/5.0005189

Cited by 80 publications

(18 citation statements)

References 50 publications

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“…There are two approaches in research quantitative and qualitative. Becker, et al [111] found that the quantitative approach places emphasis on quantifying the study and uses quantitative analysis, i.e., analyzing data with a deductive approach [112]. Based on previous approaches, the current research used a quantitative approach because this approach is considered to be better when testing the hypothesis, based on the previous theory.…”

Section: Methodsmentioning

confidence: 99%

Factors Influencing Green Purchase Intention: Moderating Role of Green Brand Knowledge

Siyal

Ahmed

Ahmad

et al. 2021

IJERPH

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The current study aims to investigate the moderating effect of green brand knowledge (GBK) on the relationship of green brand positioning (GBP), attitude towards the green brand (ATGB), environmental concern (EC) and green purchase intention (GPI) in Pakistan. For this purpose, the data was collected from the individuals who were buying organic food by using purposive sampling, using cross-sectional research design and quantitative research approach. The Partial Least Square (PLS)-Structural Equation Modeling (SEM) technique results had shown that all the direct-effect relationships, namely, GBP, ATGB, EC variables have a positive and significant relationship with the GPI. While indirect-effect relationships have shown that the relationships of ATGB, EC and GPI are significantly moderated by GBK, which indicated that the effect of GBP, and EC toward GPI would be stronger when individuals have strong knowledge about green brands. In contrast, GBK is not significantly moderating the relationship between GBP and GPI. The empirical findings of this study fill a gap in the existing body of literature regarding the effects of GPI, ATGB and EC on green brands, as well as the moderating effect of GBK. As a result, this study provides insight into the topic, which has not been thoroughly investigated in earlier studies. Therefore, we consider that understanding this moderating effect is a positive contribution to the existing body of knowledge, which could help researchers explore this relationship in the future. This study could also help the owners and managers to know about the importance of these exogenous, and moderate variables to increase their customer’s green purchase intentions.

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Section: Methodsmentioning

confidence: 99%

Factors Influencing Green Purchase Intention: Moderating Role of Green Brand Knowledge

Siyal

Ahmed

Ahmad

et al. 2021

IJERPH

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“…Continuous reflection will be observed up to the motor exit. Then to avoid the reflection of the shock wave, the central body of the air intake must be placed according to (21). Knowing that (k=1, φ=ψ, ω=2, P=P 2 ) for the dihedral and (k=2, φ=θ C , ω=π, P=P C ) for the cone.…”

Section: Applicationsmentioning

confidence: 99%

“…The values of P/P 02 and P 02 /P 01 in (21) are respectively given by (18) and 14respectively when T=T 2 , ρ=ρ 2 and P=P 2 , ρ 0 =ρ 02 and P=P 02 for the dihedron, and when T=T C , ρ=ρ C and P=P C , ρ 0 =ρ 02 for the cone. While φ and P 0 are among the data of our study.…”

Section: Applicationsmentioning

confidence: 99%

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Gas effect for oblique and conical shock waves at high temperature

Yahiaoui

Zebbiche

Allali

et al. 2020

Math. Model. Nat. Phenom.

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The work focuses to develop a new numerical calculation program for determining the gas effect at high temperature instead air on the calculation of the oblique and conical shock waves parameters and make applications for various external and internal aerodynamics problems like, the calculation of the suitable intake adaptation parameters, dihedron and cone wave drag, aerodynamic coefficients of a pointed supersonic airfoil and oblique shock reflection. All this for future aerodynamics (gas dynamics) like the phenomenon of climate change in the near and far future because of the enlargement progressive of the layer ozone hole which will lead to an increase in the temperature of the ambient medium, and by the environment pollution by the shining of the waste which will cause a new decomposition of gases from the ambient environment. Another interesting application for actual aerodynamics (gas dynamics) is the performance of tests in wind tunnels supplied by a combustion chamber making a reaction of gases giving a gas with new thermodynamics parameters which is not necessarily air. To make a calculation, the selected gases are H 2 , O 2 , N 2 , CO, CO 2 , H 2 O, NH 3 , CH 4 and air.

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“…The analysis results demonstrated that the use of a hybrid NF of copper and alumina in water dramatically dropped the temperature of the H/S in comparison with applying other NFs. The results of studies on the channels and pipes revealed that the use of wavy walls instead of a flat wall improves heat transfer [34][35][36][37][38]. In one of these articles, Vanaki et al [38] studied the impact of wavy walls on a macro-sized channel.…”

Section: Introductionmentioning

confidence: 99%

A Computational Fluid Dynamic Study on Efficiency of a Wavy Microchannel/Heat Sink Containing Various Nanoparticles

et al. 2021

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In this paper, a common and widely used micro-heat sink (H/S) was redesigned and simulated using computational fluid dynamics methods. This H/S has a large number of microchannels in which the walls are wavy (wavy microchannel heat sink: WMCHS). To improve cooling, two (Al2O3 and CuO) water-based nanofluids (NFs) were used as cooling fluids, and their performance was compared. For this purpose, studies were carried out at three Reynolds numbers (Re) of 500, 1000, and 1500 when the volume percent (φ) of the nanoparticles (NPs) was increased to 2%. The mixture two-phase (T-P) model was utilized to simulate the NFs. Results showed that using the designed WMCHS compared to the common H/S reduces the average and maximum temperatures (T-Max) up to 2 °C. Moreover, using the Al2O3 NF is more suitable in terms of WMCHS temperature uniformity as well as its thermal resistance compared to the CuO NF. Increasing the φ is desirable in terms of temperature, but it enhances the pumping power (PP). Besides, the Figure of Merit (FOM) was investigated, and it was found that the value is greater at a higher volume percentage.

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Numerical study on transition structures of oblique detonations with expansion wave from finite-length cowl

Cited by 80 publications

References 50 publications

Factors Influencing Green Purchase Intention: Moderating Role of Green Brand Knowledge

Factors Influencing Green Purchase Intention: Moderating Role of Green Brand Knowledge

Gas effect for oblique and conical shock waves at high temperature

A Computational Fluid Dynamic Study on Efficiency of a Wavy Microchannel/Heat Sink Containing Various Nanoparticles

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