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- 저자 : Tianlin Wang (검색결과 5 건)
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Tianlin Ma,Manyun Yin,Chunyang Su,Ningfei Guo,Xiangxiang Huang,Zhen Han,Yujie Wang,Gangling Chen,Zhi Yun 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.117 No.-
The surplus production of glycerol as a byproduct of biodiesel has become an urgent problem for the sustainabilityof the biodiesel industry. The catalytic transformation of glycerol to value-added chemicalshas attracted the attention of researchers worldwide over the last decade. Among them, selective dehydrationof glycerol to acrolein has gained interest from both academic researchers and industrial applications. Molecular sieves have been considered as the most promising catalysts for industrialapplications of glycerol dehydration. However, there is no systematic summary for the research carriedout for this reaction over molecular sieve catalysts. This work provides a comprehensive and criticalreview of glycerol dehydration to acrolein over molecular sieve catalysts, including ZSM-5, ZSM-11,MCM-22, MCM-41, SBA-15, SAPO-34, HY and Hb. The key technical problems that restrict its industrialapplication are the easy coking and poor stability of the molecular sieves. In particular, the pore size, porestructure, acid amount, acid strength, acid type and reaction conditions that influence the dehydrationperformance are discussed in detail. Furthermore, the reaction mechanism, reaction kinetics, reactionthermodynamics and future research directions for catalyst design and engineering are also presented. This review will deepen our understanding of the catalytic dehydration of glycerol to acrolein and provideguidance for researchers on the rational design of molecular sieve catalysts.
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Dynamic modeling and three-dimensional motion simulation of a disk type underwater glider
Pengyao Yu,Tianlin Wang,Han Zhou,Cong Shen 대한조선학회 2018 International Journal of Naval Architecture and Oc Vol.10 No.3
Disk type underwater gliders are a new type of underwater gliders and they could glide in various directions by adjusting the internal structures, making a turnaround like conventional gliders unnecessary. This characteristic of disk type underwater gliders makes them have great potential application in virtual mooring. Considering dynamic models of conventional underwater gliders could not adequately satisfy the motion characteristic of disk type underwater gliders, a nonlinear dynamic model for the motion simulation of disk type underwater glider is developed in this paper. In the model, the effect of internal masses movement is taken into consideration and a viscous hydrodynamic calculation method satisfying the motion characteristic of disk type underwater gliders is proposed. Through simulating typical motions of a disk type underwater glider, the feasibility of the dynamic model is validated and the disk type underwater glider shows good maneuverability.
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Dynamic modeling and three-dimensional motion simulation of a disk type underwater glider
Yu, Pengyao,Wang, Tianlin,Zhou, Han,Shen, Cong The Society of Naval Architects of Korea 2018 International Journal of Naval Architecture and Oc Vol.10 No.3
Disk type underwater gliders are a new type of underwater gliders and they could glide in various directions by adjusting the internal structures, making a turnaround like conventional gliders unnecessary. This characteristic of disk type underwater gliders makes them have great potential application in virtual mooring. Considering dynamic models of conventional underwater gliders could not adequately satisfy the motion characteristic of disk type underwater gliders, a nonlinear dynamic model for the motion simulation of disk type underwater glider is developed in this paper. In the model, the effect of internal masses movement is taken into consideration and a viscous hydrodynamic calculation method satisfying the motion characteristic of disk type underwater gliders is proposed. Through simulating typical motions of a disk type underwater glider, the feasibility of the dynamic model is validated and the disk type underwater glider shows good maneuverability.
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Han Zhou,Tianlin Wang,Li Sun,Xiang Jin 제어·로봇·시스템학회 2021 International Journal of Control, Automation, and Vol.19 No.1
A disc-type underwater glider (DTUG) has a highly symmetrical full-wing shape that allows it to moveomnidirectionally and have the same hydrodynamic characteristics in all directions in the horizontal plane. Thesecharacteristics make the viscous hydrodynamic coefficients measured by conventional methods unsuitable for simulating the omnidirectional and steering motions of the DTUG. To further reveal the omnidirectional and steeringmotion characteristics of the DTUG, this paper proposes a new theoretical method for calculating the DTUG motion control equations in the velocity frame rather than the body frame. Based on the structural characteristics ofthe DTUG, the motion control equations are derived and then solved using the fourth-order Runge-Kutta method. The omnidirectional and steering motions of the DTUG are simulated in the velocity frame and compared withthe results calculated in the body frame. The results show that the viscous hydrodynamic coefficients obtained byconventional methods are not suitable for analyzing the omnidirectional motion of the DTUG, and the method ofcalculating the motion control equations in the body frame has limitations in studying the steering motion. The newmethod proposed in this paper solves these limitations well and can more accurately reveal the motion characteristics of the DTUG without recalculating the hydrodynamic coefficients. The results also show that the DTUG canchange the heading angle more easily than a torpedo-type underwater glider (TTUG), and the steering radius ismuch smaller, which means that the DTUG has greater flexibility in a small body of water. The DTUG can remainstable when the control variables are within the control range and the new method is adopted.
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