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Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle

ZENG Zhuoxiong, HAN Shoulei, ZHOU Lixing

Frontiers in Energy 2007, Volume 1, Issue 2,   Pages 202-206 doi: 10.1007/s11708-007-0026-6

Abstract: The model is employed to simulate gas-particle flows in a sudden-expansion chamber.

Keywords: gas-particle     single-scale second-order     large-scale fluctuation     second-order     sudden-expansion    

Lagrangian simulation of deposition of CO gas-solid sudden expansion flow

HUANG Dongping, DING Guoliang, QUACK Hans

Frontiers in Energy 2008, Volume 2, Issue 2,   Pages 216-221 doi: 10.1007/s11708-008-0032-3

Abstract: Freezing and blockage resulting from the deposition of solid CO formed because of sudden expansion ofTo overcome this problem, the characteristics of the CO gas-solid sudden expansion flow are studied by

Keywords: comparison     gas-solid     downstream     blockage     Lagrangian    

Analysis on running safety of train on the bridge considering sudden change of wind load caused by wind

Tian ZHANG, He XIA, Weiwei GUO

Frontiers of Structural and Civil Engineering 2018, Volume 12, Issue 4,   Pages 558-567 doi: 10.1007/s11709-017-0455-1

Abstract: analysis model of wind-vehicle-bridge system with wind barrier is established, and the influence of suddenIt is shown that the sudden change of wind load caused by wind barrier has significant influence on the

Keywords: wind barrier     sudden change of wind load     dynamic response     running safety     comfort    

Local resistance of fluid flow across sudden contraction in small channels

Hang GUO, Ling WANG, Jian YU, Fang YE, Chongfang MA, Zhuo LI,

Frontiers in Energy 2010, Volume 4, Issue 2,   Pages 149-154 doi: 10.1007/s11708-009-0060-7

Abstract: The pressure drop caused by flow area contraction in microchannels has been experimentally studied in this paper using the tiny gap pressure measurement method. The working fluid was deionized water at room temperature at near-atmospheric pressure. Three test sections with area ratios of 0.284 and 0.274 and at different tube diameter sizes were used. The experimental results show that the abrupt contraction coefficient decreases with the Reynolds number increasing, and it is much higher than that of conventional tubes in laminar flow. The widely-applied correlation =0.5(1−) could not predict the contraction coefficient of turbulent flow in the micro tubes. The decreases as the tube diameter increases. The transition from laminar to turbulent flow is not obvious when the diameter of the small tube is 0.32mm.

Keywords: microchannels     pressure drop     abrupt contraction     loss coefficients    

Progressive collapse of 2D reinforced concrete structures under sudden column removal

El Houcine MOURID, Said MAMOURI, Adnan IBRAHIMBEGOVIC

Frontiers of Structural and Civil Engineering 2020, Volume 14, Issue 6,   Pages 1387-1402 doi: 10.1007/s11709-020-0645-0

Abstract: strategy to model and simulate the progressive collapse of multi-story reinforced concrete structure under suddencontribution pertains to a very thorough investigation of progressive collapse of the structure under sudden

Keywords: failure mechanism     MBS dynamic analysis     gravity loads     structure-ground contact     structure-structure contact     energy conserving/decaying scheme    

A MATLAB code for the material-field series-expansion topology optimization method

Frontiers of Mechanical Engineering 2021, Volume 16, Issue 3,   Pages 607-622 doi: 10.1007/s11465-021-0637-3

Abstract: This paper presents a MATLAB implementation of the material-field series-expansion (MFSE) topo-logy optimizationWith the series-expansion method for bounded fields, this material field is described with the characteristic

Keywords: MATLAB implementation     topology optimization     material-field series-expansion method     bounded material    

Assessment of bridge expansion joints using long-term displacement measurement under changing environmental

Youliang DING, Aiqun LI

Frontiers of Structural and Civil Engineering 2011, Volume 5, Issue 3,   Pages 374-380 doi: 10.1007/s11709-011-0122-x

Abstract: This paper addresses the problem of condition assessment of bridge expansion joints using long-term measurementThe effects of temperature, traffic loading and wind on the expansion joint displacements are analyzedStatistical process control using mean value control charts is further used to detect damage to the bridge expansionhad a good capability for detecting the damage-induced 1.0% variances of the annual changes in the expansion

Keywords: structural health monitoring     displacement     expansion joint     temperature effect     wind effect     traffic loading    

An approach for evaluating the impact of an intermittent renewable energy source on transmission expansion

Rongrit CHATTHAWORN,Surachai CHAITUSANEY

Frontiers of Information Technology & Electronic Engineering 2015, Volume 16, Issue 10,   Pages 871-882 doi: 10.1631/FITEE.1500049

Abstract: optimization approach to evaluate the impact of an intermittent renewable energy source on transmission expansionscenarios representing the intermittent renewable energy generation and loads is proposed to obtain robust expansionMoreover, the impact of an intermittent renewable energy source on TEP was evaluated by comparing expansion

Keywords: Adaptive tabu search     Renewable energy generation     Robust optimization     Transmission expansion planning    

Achieving desired nodal lines in freely vibrating structures via material-field series-expansion topology

Frontiers of Mechanical Engineering 2023, Volume 18, Issue 3, doi: 10.1007/s11465-023-0758-y

Abstract: In this study, an effective material-field series-expansion (MFSE)-based topology optimization design

Keywords: nodal line     topology optimization     structural dynamics design     material-field series-expansion    

Research on Expansion Theory of Ammonium Nitrate

Lü Chunxu

Strategic Study of CAE 2001, Volume 3, Issue 9,   Pages 58-63

Abstract:

In this paper, expansion process of AN is described, its physical chemical parameters are calculatedand determined, the influeucing factors of AN expansion process are studied and a possible mechanismof expansion process is also given.

Keywords: expanded ammonium nitrate     expansion theory     physical chemical parameter     influencing factor    

Modelling autogenous expansion for magnesia concrete in arch dams

JIN Feng, LUO Xiaoqing, ZHANG Chuhan, ZHANG Guoxin

Frontiers of Structural and Civil Engineering 2008, Volume 2, Issue 3,   Pages 211-218 doi: 10.1007/s11709-008-0025-7

Abstract: To evaluate the effects of autogenous expansion on the stresses of arch dams, a simple model of autogenousexpansion for Magnesia Concrete in dam engineering is presented.This model is based on three assumptions: 1) the total amount of autogenous expansion of Magnesia Concreteis related only to the properties of materials and mixing of concrete; 2) the autogenous expansion ofelement arch dam simulation software, this model is employed to simulate the effects of autogenous expansion

Keywords: field-measured     irreversibility     temperature     irreversible     element arch    

Scheme Study and Strategy on Expansion of Ethylene Plant to 660 kt/a at Yanshan Petrochemical Company

Cao Xianghong

Strategic Study of CAE 2003, Volume 5, Issue 11,   Pages 34-46

Abstract:

Yanshan Petrochemical Company after having expanded its 300 kt/a steam cracking unit to 450kt/k in 1994 is still experiencing such problems as low feedstock flexibility, high energy consumption and smaller scale as compared to other ethylene units constructed in the same time. In order to fully improve technical capability of steam crackers, reduce energy consumption, improve feedstock flexibility and increase production capacity, a lot of technical revamp cases on steam cracking were studied and compared with attention focused on the feasibility, safety, operability of the related revamp cases, as well as the advanced nature and economical features of the cases studied. As regards the pyrolysis-quench-compression system, the steam crackers will be retrofitted on the site with the pyrolysis gasoline fractionation tower, quench water tower, pyrolysis gas compressor and steam turbine replaced by new ones, respectively. The separation system will adopt a low-pressure methane removal technology with the demathanizer tower replaced, coupled with the C3 catalytic rectification/hydrogenation technology, while the high-pressure depentanizer will be replaced with the addition of a propylene rectification tower. The fractionation flow sheet and equipment will be adjusted with the addition of a propylene compressor and compressor for binary mixture of methane-ethylene cooling agents. This revamp has expanded the ethylene capacity to the target of 660 kt/a with the actual capacity reaching 710 kt/a. This revamp project has remarkably reduced the energy consumption, which is capable of using naphtha, light diesel fuel, heavy diesel fuel and the hydrocracked tail oil as the steam cracking feedstock. This project is the first to apply refrigeration by means of a mixed ccx)ling agent and has succeeded in using C3 catalytic rectification/ hydrogenation technology, which has given an impetus to the progress of steam cracking industry in the world.

Keywords: ethylene     plant     expansion     scheme     stady    

multi-functional dynamic state estimator for error validation: measurement and parameter errors and sudden Article

Mehdi AHMADI JIRDEHI,Reza HEMMATI,Vahid ABBASI,Hedayat SABOORI

Frontiers of Information Technology & Electronic Engineering 2016, Volume 17, Issue 11,   Pages 1218-1227 doi: 10.1631/FITEE.1500301

Abstract: The proposed algorithm also successfully detects and identifies sudden load changes in power systems.

Keywords: Dynamic state estimation     Kalman filter     Measurement errors     Branch parameter errors     Sudden load changes    

The research of competence set expansion’s

Wang Huating, Feng Junweng, Miao Chenglin, Wang Jian

Strategic Study of CAE 2008, Volume 10, Issue 8,   Pages 51-55

Abstract:

Competence set expansion is a process that decision-maker expands theThis paper analyses the concept of competence set and its expansion and provides competence set expansion

Keywords: expansion of competence set     habitual domain     managerial decision making    

Industrial land expansion in rural China threatens environmental securities

Chi Zhang, Wenhui Kuang, Jianguo Wu, Jiyuan Liu, Hanqin Tian

Frontiers of Environmental Science & Engineering 2021, Volume 15, Issue 2, doi: 10.1007/s11783-020-1321-2

Abstract: . • RIL expansion cost 9% of China’s crop production and threatened human/ecosystem safety. • The underprivilegedAccelerated rural industrial land expansion, particularly in regions under high geo-hazard risks, ledMoreover, negative effects from rural industrial land expansion could partially offset the crop productionThis study aims to inspire policy makers and researchers to rethink the current model of industrial expansion

Keywords: Industrialization     Land-use change     Environment risks     Environmental security     Urbanization     China    

Title Author Date Type Operation

Numerical simulation of sudden-expansion two-phase flows with two-scale second-order moment particle

ZENG Zhuoxiong, HAN Shoulei, ZHOU Lixing

Journal Article

Lagrangian simulation of deposition of CO gas-solid sudden expansion flow

HUANG Dongping, DING Guoliang, QUACK Hans

Journal Article

Analysis on running safety of train on the bridge considering sudden change of wind load caused by wind

Tian ZHANG, He XIA, Weiwei GUO

Journal Article

Local resistance of fluid flow across sudden contraction in small channels

Hang GUO, Ling WANG, Jian YU, Fang YE, Chongfang MA, Zhuo LI,

Journal Article

Progressive collapse of 2D reinforced concrete structures under sudden column removal

El Houcine MOURID, Said MAMOURI, Adnan IBRAHIMBEGOVIC

Journal Article

A MATLAB code for the material-field series-expansion topology optimization method

Journal Article

Assessment of bridge expansion joints using long-term displacement measurement under changing environmental

Youliang DING, Aiqun LI

Journal Article

An approach for evaluating the impact of an intermittent renewable energy source on transmission expansion

Rongrit CHATTHAWORN,Surachai CHAITUSANEY

Journal Article

Achieving desired nodal lines in freely vibrating structures via material-field series-expansion topology

Journal Article

Research on Expansion Theory of Ammonium Nitrate

Lü Chunxu

Journal Article

Modelling autogenous expansion for magnesia concrete in arch dams

JIN Feng, LUO Xiaoqing, ZHANG Chuhan, ZHANG Guoxin

Journal Article

Scheme Study and Strategy on Expansion of Ethylene Plant to 660 kt/a at Yanshan Petrochemical Company

Cao Xianghong

Journal Article

multi-functional dynamic state estimator for error validation: measurement and parameter errors and sudden

Mehdi AHMADI JIRDEHI,Reza HEMMATI,Vahid ABBASI,Hedayat SABOORI

Journal Article

The research of competence set expansion’s

Wang Huating, Feng Junweng, Miao Chenglin, Wang Jian

Journal Article

Industrial land expansion in rural China threatens environmental securities

Chi Zhang, Wenhui Kuang, Jianguo Wu, Jiyuan Liu, Hanqin Tian

Journal Article