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| 1 | Numerical and physical simulation of a twin-roll strip caster显示文摘The 1:1 water model of a twin-roll strip caster was set up based on the Froude number and the Reynolds number similarity criteria. A new type metal delivery system was designed for the twin-roll strip caster. The level fluctuation and the fluid flow in the pool of the water model were measured using the level detector and the 3D-LDV (laser Doppler velocimetry) technology. It is shown that a wedged delivery system can produce the desirable level fluctuation and even fluid flow distribution in the pool. Numerical simulations for the water model were performed. Comparisons between the numerical and physical simulation results show good agreement near the side dams. | Bo Wang Jieyu Zhang Yin Zhang Youduo He Junfei Fan Yuan Fang Shengli An | 2006 | Journal of University of Science and Technology Beijing2006，13，5： | 7 |
| 2 | A Mathematical Model on Vacuum Chamber of a Multifunctional RH-degasser显示文摘A 3D-mathematical model was developed for the simulation of gas flow, combustion and heat convection in RH vacuum chamber. Under different conditions, the influences of the Kawasaki Oxygen Top Blowing system (KTB) on the gas flow, chemical reactions and temperature distributions were calculated based on the model. The optimum position of the lance is suggested for the RHKTB degassing process. | Yisheng Chen, Youduo He, Daqiang Cang, Zongze Huang 1) Institute of Metallurgical Engineering, UIST, Baotou 014010, China 2) Metallurgy School, University of Science and Technology Beijing. Beijing 100083. China 3) Technical Centre, Baoshan Iron & steel G | 2001 | Journal of University of Science and Technology Beijing2001，8，4： | 2 |
| 3 | Review and Analysis of Key Techniques in Marine Sediment Sampling显示文摘Deep-sea sediment is extremely important in marine scientific research,such as that concerning marine geology and microbial communities.The research findings are closely related to the in-situ information of the sediment.One prerequisite for investigations of deep-sea sediment is providing sampling techniques capable of preventing distortion during recovery.As the fruit of such sampling techniques,samplers designed for obtaining sediment have become indispensable equipment,owing to their low cost,light weight,compactness,easy operation,and high adaptability to sea conditions.This paper introduces the research and application of typical deep-sea sediment samplers.Then,a representative sampler recently developed in China is analyzed.On this basis,a review and analysis is conducted regarding the key techniques of various deep-sea sediment samplers,including sealing,pressure and temperature retaining,low-disturbance sampling,and no-pressure drop transfer.Then,the shortcomings in the key techniques for deep-sea sediment sampling are identified.Finally,prospects for the future development of key techniques for deep-sea sediment sampling are proposed,from the perspectives of structural diversification,functional integration,intelligent operation,and high-fidelity samples.This paper summarizes the existing samplers in the context of the key techniques mentioned above,and can provide reference for the optimized design of samplers and development of key sampling techniques. | Shudong He Youduo Peng Yongping Jin Buyan Wan Guangping Liu | 2020 | Chinese Journal of Mechanical Engineering2020，33，5： | 2 |
| 4 | Design and Experimental Study of Pressure Compensation System for Full-Ocean-Depth Gas-Tight Sediment Sampler显示文摘Aiming at the requirement of the full-ocean-depth(operating water depth 11000 m)manned submersible to carry out the gas-tight sampling operation of the abyss seabed sediment,a kind of full-ocean-depth carrier submersible mechanical hand-held,full-ocean-depth gas-tight sediment sampler(GTSS)with the function of pressure-retaining and coring is designed.Firstly,the volume change model of pressure compensator is established,and it is pointed out that the volume of pressure compensator is about 16.14%equal to the volume of gas-tight sediment sampler(GTSS).Secondly,the pressure compensator is analyzed and calculated,and the relationship between the precharge pressure of the pressure compensator,the nominal volume of the pressure compensator and the pressure holding effect of the gas-tight sediment sampler(GTSS)is studied.The results show that with the increase of gas precharge pressure in the pressure compensator,the final pressure of the sampler also increases.Under the same precharge pressure condition,the larger the nominal volume of the pressure compensator,the greater the final pressure of the sampler.Finally,the air tightness test method is designed by using the developed gas tightness sampler of the full-ocean-depth product,and the change of the final pressure in the gas tight sampler under different precharge pressure is observed.The test results are consistent with the simulation results,indicating the correctness of the pressure compensation system(PCS)model. | Guangping Liu Yongping Jin Youduo Peng Buyan Wan | 2022 | Chinese Journal of Mechanical Engineering2022，35，2： | 1 |
| 5 | The dynamic running law study on driving system of hydraulic winder 显示文摘 | Peng Youduo Liu Deshu Guo Yingfu | 2002 | Journal of Coal science &Engineering2002，8，1： | 1 |
| 6 | The effect of tundish wall inclination on the fluid flow and mixing: A modeling study显示文摘 | Youduo He Yogeshwar Sahai | 1987 | Metallurgical Transactions B1987，，1： | 1 |
| 7 | The dynamic running law study on driving system of hydraulic winder显示文摘 | Peng Youduo etc | 2002 | Journal of Coal science & Engineering2002，8，1： | 1 |
| 8 | The effect of tundish wall inclination on the fluid flow and mixing: A modeling study显示文摘 | Youduo He Yogeshwar Sahai | 1987 | Metallurgical Transactions B1987，，1： | 1 |
| 9 | Flow and Temperature Fields in Slab Continuous Casting Molds显示文摘In order to develop super-board and super-thick slabs, the flow and temperatur fields were studied in slab continuous casting molds under different practical conditions, such as slab dimensions, with-drawing slab speed, design of nozzles, and superheat tempera-ture. The results showed that it is preferred to incline nozzle bores downwards and the submerged depth of the nozzles is best kept be-tween 250-300 mm. In addition, the solidified shell is thicker at the wide face than that at the narrow face, while the thin points alongthe wide face ekist both in the center and in the some area toward each respective end. | Yin Zhang Liguo Cao Youduo He Shiqi Li Yishen Shen(Institute of Metallurgical Engineering, Baotou University of Iron & Steel Technology Baotou 014010, China)(Metallurgy School, University of Science and Technology Beijing, Beijing 100083, China) | 2000 | International Journal of Minerals,Metallurgy and Materials2000，14，2： | 1 |
| 10 | Simulated and Experimental Study of Seabed Sediments Sampling Parameters Based on the VOF Method显示文摘Sediments in the seabed hold vital clues to the study of marine geology,microbial communities and history of ocean life,and the remote operated vehicle(ROV)mounted tubular sampling is an important way to obtain sediments.However,sampling in the seabed is a particularly difficult and complicated task due to the difficulty accessing deep water layers.The sampling is affected by the sampler’s structural parameters,operation parameters and the interaction between the sampling tube and sediments,which usually results in low volume and coring rate of sediments obtained.This paper simulated the soft viscous seabed sediments as non-Newtonian Herschel-Bulkley viscoplastic fluids and established a numerical model for the tubular sampling based on the volume of fluid(VOF)method.The influence rules of the sampling tube diameter,drainage area rate,penetration velocity,and sediments dynamic viscosity on coring rate and volume were studied.The results showed that coring volume was negatively correlated with all the parameters except the sampling tube diameter.Furthermore,coring rate decreased with increases in penetration velocity,drainage area rate,and sediments dynamic viscosity.The coring rate first increased and then decreased with increasing of the sampling tube diameter,and the peak value was also influenced by penetration velocity.Then,based on the numerical simulation results,an experimental sampling platform was set up and real-world sampling experiments were conducted.The simulation results tallied with the experimental results,with a maximum absolute error of only 4.6%,which verified that the numerical simulation model accurately reflected real-world sampling.The findings in this paper can provide a theoretical basis for facilitating the optimal design of the geometric structure of the seabed sediments samplers and the parameters in the sampling process. | Shudong He Youduo Peng Yongping Jin Jian Yan Buyan Wan | 2022 | Chinese Journal of Mechanical Engineering2022，35，2： | 0 |
| 11 | Numerical simulation of the liquid steel flow and solidification phenomena in the slab continuous casting process显示文摘A 3D coupling mathematical simulation program of the fluid flow,thermal transfer and solidification was developed based on the slab continuous casting process.Some characteristics such as fluid flow,solidification and temperature distribution near the submerged entry nozzle (SEN) and the corner of the mold were simulated and analyzed.The result of the calculation indicates that the flow of molten metal forms two big cycling zones in the mold after it flows out of the SEN,and the temperature at the center of the two zones is relatively low.Moreover,there is a small narrow cycling zone near the narrow side of the mold due to casting.The velocity of the surface flow,the turbulent kinetic energy and the F value might reveal the relationship between the fluctuation of meniscus and the quality of the slab to some degree. | FAN Junfei SHEN Jianguo ZHI Jianjun REN Sanbing ZHAO Shunli ZHANG Yin ZHANG Jieyu HE Youduo | 2009 | Baosteel Technical Research2009，3，1： | 0 |
| 12 | A study on mathematical simulation of spray forming process显示文摘An integrated approach for modeling the entire spray forming process is presented in this paper,and the program for the simulation is developed.The whole spray forming process can be divided into four calculation processes and the basis for the analysis is the classical k-εturbulence model which was used to simulate the flow field of gas formed in the chamber.In the atomization model the flow field of gas is coupled with formation,velocity and location of droplet.By means of the above mathematical model,the process of spray forming was simulated. | Junfei Fan Yin Zhang Sanbing Ren Hairong Le Shunli Zhao Youduo He | 2007 | Baosteel Technical Research2007，1，1： | 0 |
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