Showing papers by "Yueming Li published in 2017"
TL;DR: In this article, the thermal conductivity of five polyurethane foam samples formed by blowing agents of CP, CP+IP, CP−+-245fa and CP+−245fa+LBA were measured using transient plane source method under various environment.
132 citations
TL;DR: In this paper, the spectral extinction coefficient of fiber/opacifier loaded silica aerogel composite is obtained by considering the practical absorption of KBr diluents, and the thermal conductivity of 10 fiber and opacifier doped 10-layer composites are studied experimentally and theoretically.
51 citations
TL;DR: In this article, a numerical study is conducted to investigate the deviation of anisotropic thermal conductivity due to the noncompliance of the theoretical assumption of the transient plane source (TPS) method.
41 citations
TL;DR: In this article, the effect of radiative heat transfer on determining thermal conductivity of semi-transparent materials using transient plane source method is numerically studied and the results show that the thermal conductivities of semitrans transparent materials measured by transient plane sources will be overestimated at temperature higher than 600 k and extinction coefficient less than 2000 m −1 where radiative Heat Transfer is dominant.
34 citations
TL;DR: In this paper, a reduced-order model is proposed to predict gust loads using computational fluid dynamics is prohibitively expensive and unrealistic for parametric searches, and the model is parametric with respect to the gust disturbance.
26 citations
TL;DR: In this article, the effects of creep-plastic behavior of BC and TGO on the TC/TGO/BC interface stress development were investigated, and it was shown that if the creep in TGO is considered, the stresses will be overall relaxed no matter if BC is plastic, creep or creepplastic.
25 citations
TL;DR: In this paper, an analytical study for vibration and acoustic radiation of a finite thin orthotropic composite cylindrical shell excited by a harmonic concentrated force in a hygroscopic environment is presented.
Abstract: An analytical study is presented for vibration and acoustic radiation of a finite thin orthotropic composite cylindrical shell excited by a harmonic concentrated force in a hygroscopic environment....
22 citations
TL;DR: In this article, the numerical investigation of thermal effect on band gap dynamical characteristic for a two-dimensional binary structure composed of aluminum plate periodically filled with nitrile rubber cylinder is presented.
Abstract: In this study, the numerical investigation of thermal effect on band gap dynamical characteristic for a two-dimensional binary structure composed of aluminum plate periodically filled with nitrile rubber cylinder is presented. Initially, the band gap of the binary structure variation trend with increasing temperature is studied by taking the softening effect of thermal stress into account. A breakthrough is made which found the band gap being narrower and shifting to lower frequency in thermal environment. The complete band gap which in higher frequency is more sensitive to temperature that it disappears with temperature increasing. Then some new transformed models are created by changing the height of nitrile rubber cylinder from 1mm to 7mm. Simulations show that transformed model can produce a wider band gap (either flexure or complete band gap). A proper forbidden gap of elastic wave can be utilized in thermal environment although both flexure and complete band gaps become narrower with temperature. Be...
10 citations
TL;DR: In this paper, a return mapping algorithm model for unified strength theory (UST) is applied to reflect the strength difference in tension and compression in ceramic top coat (TC) layer, which leads to the movement of maximum tensile stress from interface to position above it.
Abstract: The experimental research shows that ceramic top coat (TC) exhibits obvious strength difference (SD) in tension and compression, called SD property. This property significantly affect stress evolution, however, there are few attentions to it. In this paper, the stress evolution in TC layer is investigated by considering SD property. To reflect its property, a return mapping algorithm model for unified strength theory (UST), proposed by us, is applied. The results reveal that SD property leads to the movement of maximum tensile stress from interface to the position above it. It suggests that the crack might not be directly initiated at interface but above it, which has been reported in experimental studies too. The results also reveal that the possibility of above-interface cracking could be increased by varying the material properties, such as elevating compressive-tensile strength ratio and reducing yield strength of TC, and by changing the coating geometries, such as thickening thermally grown oxide (TGO) layer and increasing TC interfacial amplitude-wavelength ratio.
7 citations
TL;DR: In this article, the authors performed a deep going investigation on the counter-rotating vortex pair (CVP) in single-jet film cooling based on hybrid thermal lattice Boltzmann method (HTLBM) and large eddy simulation.
5 citations
TL;DR: In this paper, an automated procedure for transonic aeroelastic analysis method was proposed when the structural model parameters changed at global level, which can accurately produce pulse responses corresponding to the mode excitations and the flutter characteristics of AGARD 445.6 wing in a very large modification range.
TL;DR: In this paper, the authors combined the acoustic analogy method with the RANS-based nonlinear acoustics solver (NLAS) to understand the vortex-structure interaction generated aerodynamic noise.
Abstract: In past several decades, vortex-structure interaction generated aerodynamic noise became one of the main concerns in aircraft design. In order to understand the mechanism, the acoustic analogy method combined with the RANS-based nonlinear acoustics solver (NLAS) is investigated. The numerical method is firstly evaluated by the experiment data of the classic rod-airfoil model. Compared with the traditional analogy methods, the RANS/NLAS can capture the nonlinear aerodynamic noise more accurately with lower gird requirements. Then different rod-airfoil configurations were simulated to investigate the aeroacoustic interaction effects. The numerical results are in good agreement with those of the earlier experimental research. It is found that the vortex-shedding crash to the airfoil is the main reason for the noise generation which is dependent on the configurations, distance, and flow conditions.