Yuting Wu^1,2,*, Qiangyu Wen^1,2

The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 166-166, 2019, DOI:10.32604/icces.2019.05532

Abstract The liquid refrigerant injection is an impactful measure to decrease discharge temperature and improve performance of single screw compressor by injecting liquid refrigerant into the working chamber. The modeling of calculating injection mass on single screw compressor is presented considering compression, main leakage and Exhaust reflux base on mechanism of injection of liquid refrigerant and compressive process. Injection area is significant factor to calculate injection mass, and accurate injection mass can foresee precisely exhaust temperature of compressor. The effective injection area can be received by the methods of integration and projection which means injection hole is projected onto the plane… More >

Zhiyu Guo*, Yuting Wu

The International Conference on Computational & Experimental Engineering and Sciences, Vol.22, No.3, pp. 161-164, 2019, DOI:10.32604/icces.2019.05490

Abstract Generally, the greater the difference between evaporation and condensation temperature of ORC(Organic Rankie Cycle) is, the higher system efficiency and the larger expansion ratio will be [1,2]. Fig. 1 shows that net efficiency of theoretical cycle and expansion ratio of ORC system changes with evaporation temperature when condensing temperature is 313 K (R123 and HFO-1336mzz (Z) are selected). More >

Baogang Tian¹, Yang Shao¹, Zhijiong Wang¹, Jian Li^2,*

Molecular & Cellular Biomechanics, Vol.14, No.3, pp. 187-194, 2017, DOI:10.3970/mcb.2017.014.187

Abstract The purpose of this study was to explore the clinical efficacy and safety of posterior pedicle screw fixation in the treatment of thoracolumbar burst fracture. A total of 120 patients with thoracolumbar burst fractures were selected from January 2014 to December 2016. 60 patients were divided into the study group, and 60 patients were as the control group. The patients in the study group were treated with posterior pedicle screw fixation. The control group was treated with posterior non-traumatic pedicle screw fixation. After treatment, there were six months follow up. The clinical indexes, complications, and the anterior aspect height ratio,… More >

T.W. Dong¹, H.S. Liu¹, S.L. Jiang², L.Gu¹, Q.W. Xiao¹, Z. Yu¹, X.F. Liu³

CMES-Computer Modeling in Engineering & Sciences, Vol.95, No.5, pp. 369-390, 2013, DOI:10.3970/cmes.2013.095.369

Abstract In this paper, we present a free surface flow model with a forced revolving moving boundary for partially filled screw extrusion. The incompressible smoothed particle hydrodynamics (ISPH) is used to simulate this complex flow. A set of organic glass experimental device for this partially filled fluid is manufactured. SPH results are satisfactorily compared with experiment results. The computed free surfaces are in good agreement with the free surfaces obtained from the experiment. Further analysis shows that with the increase of the speed, the average velocity of fluid increases, the effect of centrifugal force begin to show up, the maximum pressure… More >

A. Ramach,ra Murthy^1,2, V. Ramesh Kumar¹, Smitha Gopinath¹, PrabhatRanjan Prem¹, Nagesh R. Iyer³, Reshmi Balakrishnan⁴

CMC-Computers, Materials & Continua, Vol.44, No.1, pp. 59-72, 2014, DOI:10.3970/cmc.2014.044.059

Abstract This paper investigates the flexural performance of a sandwich panel made up of ultra high strength concrete (UHSC) as top and bottom skin and cold formed steel as sandwich. A novel sandwich panel has been designed such a way that bottom skin of UHSC is of precast in nature and top skin of UHSC is cast-insitu and cold formed steel (profiled sheet) as sandwich. The connection between top skin of UHSC and cold formed steel is made with self tapping screws. Flexural performance of UHSC sandwich panel has been tested under flexural loading and it is found that the post… More >

S. Gao¹, K. Nakasa², K. Nogi³, L. Huang⁴

CMC-Computers, Materials & Continua, Vol.22, No.1, pp. 39-54, 2011, DOI:10.3970/cmc.2011.022.039

Abstract An incremental press-forming method was newly developed for the fabrication of spiral plates of a continuous screw conveyer, boring screw, screw pump and so on. In this method, a pair of V-shaped punches and dies with two opposite inclined edges are used instead of punch and die with spiral surfaces. The experiments on incremental forming were carried out on aluminum alloy and steel disks with a hole and a slit, and the deformation process of the plate during and after the press-forming was simulated by a finite element method (FEM). The press-forming shows that the spiral plate has a correct… More >

Ching-Chi Hsu¹, Jinn Lin², Yongyut Amaritsakul³, Takalamesar Antonius³, Ching-Kong Chao^3,4

CMC-Computers, Materials & Continua, Vol.11, No.1, pp. 1-14, 2009, DOI:10.3970/cmc.2009.011.001

Abstract Dynamic hip screw and gamma nail have been widely used to treat the patients with proximal femoral fractures, but clinical failures of those implants are still to be found. This study developed three-dimensional finite element models to investigate the biomechanical performances of the implants. Two kinds of commercially available implants (dynamic hip screw and gamma nail) and one newly designed implant (double screw nail) under three kinds of the proximal femoral fractures (neck fracture, subtrochanteric fracture, and subtrochanteric fracture with gap) were evaluated. Double screw nail showed better biomechanical performances than dynamic hip screw and gamma nail. Two commercially available… More >