Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C (J CHIN SOC MECH ENG )

Description

  • Impact factor
    0.27
  • 5-year impact
    0.30
  • Cited half-life
    4.20
  • Immediacy index
    0.00
  • Eigenfactor
    0.00
  • Article influence
    0.10
  • ISSN
    0257-9731

Publications in this journal

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    ABSTRACT: A novel pulses discriminator for linear motors direct-drive electrical discharge machining and a control strategy for its high efficiency deep-hole processing with thin electrode are proposed. From the fundamental experiments, both conventional ZNC EDM and the direct-driven (LmEDM for short) reveal machining speed break-away points. Associated with the feedback from a novel effective pulse discriminator, a reasonable EDM jump control is further proposed. It is found the direct–drive EDM with such a control is much more efficient than traditional ZNC-EDM by totally three times of speed, for the aspect ratio of 17.5 of deep EDM. Conducted by LmEDM alone, it can also achieve two times of ZNC-EDM speed. Moreover, the surface integrity is also improved with less wear of electrode and higher wall straightness. It is contributed from more efficient debris processing by the effective pulses information, high acceleration of linear motors, and reasonable jump control.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 04/2013; 34(2):167-176.
  • Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 01/2012;
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    ABSTRACT: The lean combustion of a gas fuel within a highly porous medium has been investigated experimentally. A small-scale experimental burner system is built. The porous medium is made of stacked stainless steel 304 wire mesh, having a porosity of approximately 0.86. B-type and K-type thermocouples are used to measure the temperatures in the burner. Mass flow controllers are used to control and measure the flow rates of fuel and air. The system is integrated and controlled by using LabView program. Results show that for a given equivalence ratio, φ, there exists a range of stable burning flame speed. For φ = 0.6, the flame speed of methane in this porous burner is in the range between 23 cm/s and 74 cm/s, approximately 1.4 to 4.2 times the flame speed of freely burning flame. The leanest mixture that can be burned in the burner is approximately of φ = 0.4, much lower than the normal lean limit of 0.53. NO emission is within the measurable limit of the gas analyzer (about 1 to 2 PPM). CO emission, on the other hand, is over 2000 PPM, possibly due to the oxidation of carbon contained in the stainless steel.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 03/2001; 22(3):217-224.
  • Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 01/2000; 21(2):189-200.
  • Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 12/1997; 18(6):513-524.
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    ABSTRACT: This paper studies numerically the steady or quasi-steady flow field of the impingement of a two-phase axisymmetric supersonic cold jet suspended with solid spherical particles onto a perpendicular flat plate via a MacCormack-type TVD scheme. It is assumed that the particulate phase can be treated as a compressible continuum and that the particles adhere to the plate once they collide on it. The strength of the shock is weakened and the position of the shock is shifted toward the nozzle by either increasing the mass loading ratio or decreasing the particle diameter with other parameters held fixed. Effects of the slip velocity between both phases at the jet exit and the impinging distance are also studied in detail. It is hoped that this study will help to understand some two-phase flow features of the impingement of an exhaust plume from a rocket motor.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 05/1993; 14:266-279.
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    ABSTRACT: Single droplet evaporation in a high-temperature flow stream is studied numerically. The numerical solutions obtained in the Reynolds number range of 10 to 300 and Prandtl number range of 0.7 to 1.5 are in good agreement with the available experimental data. Additionally, the detailed distributions of local Nusselt number and mass evaporation rates along the droplet surface are presented for various Reynolds numbers and Prandtl numbers. It is found that the wake flow, which occurs in the after region of the droplet when Reynolds number is higher than a critical value, affects the heat and mass transfer between the flow stream and the droplet significantly in addition to the narrowed thermal boundary layer. Therefore, the effects of the convective flow on the droplet evaporation should be accounted for by two major factors: the narrowed thermal boundary layer around the droplet and the wake flow behind the droplet.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 01/1993; 14:100-105.
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    ABSTRACT: The equations of motion of structures with large deflections are usually nonlinear. The vibration modes of nonlinear system must be coupled together. In this paper, the method of independent modal space control (IMSC) is presented for controlling structures with weak nonlinearity. The dynamic response of a nonlinear cantilever beam, after performing IMSC, is studied. The numerical results show that the method is quite effective for reducing the displacement of the weakly nonlinear beam.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 01/1993; 14:36-44.
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    ABSTRACT: Experimental investigation on the nonlinear behavior of an axisymmetric circular jet under dual-mode, dual-frequency excitation is carried out. A loudspeaker mounted on the settling chamber wall and six loudspeakers mounted on the nozzle exit are used as the forcing devices for the axisymmetric and the helical excitations, respectively. The hot wire anemometer is used to measure the velocity distribution of the jet flow. Results show a comb-like structure in the energy spectrum when the jet is subjected to the dual-mode dual-frequency excitation. Interactions are highly enhanced when the difference between two excitation frequencies equals one fourth of the excitation frequency, regardless of whether there are axisymmetric or helical excitations. This indicates that the vortex structure of the free shear layer flow can be controlled by a special arrangement of the excitation frequencies.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 10/1992;
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    ABSTRACT: A new Young's fringe pattern analysis technique based on multidirectional scanning over a whole image plane was developed. This technique provides a useful method to process effectively those fringe patterns which are heavily modulated by noise as well as with very poor visibility. Application of laser speckle velocimetry and this fringe analysis technique to the flow velocity distribution measurement of a 2D laminar flowfield was experimentally investigated. The measured data are in good agreement with the theoretical results, although the fringe patterns are severely noisy and with low visibility.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 03/1992; 13:170-175.
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    ABSTRACT: A hodograph transformation method is employed to set up a boundary value problem for the discharge of compressible fluid from a vessel through an axisymmetric orifice. Finite difference scheme with central differencing is used to treat the hodograph equation. Numerical results of the axisymmetric flow problem are compared with the well known two-dimensional flow solutions. Differences in discharge characteristics between a compressible and an incompressible flow are also shown.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 01/1992; 13:167-170.
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    ABSTRACT: A conformal holography technique was developed to overcome the limitation of conventional holography that is applicable to sources of simple geometries, e.g., planar shape or cylindrical shape. This new technique employs hologram surfaces conformal to the arbitrarily shaped sources. On the basis of the theory of acoustic holography and the boundary element methods, two types of spatial transformation algorithms with high computational efficiency and accuracy were presented in this paper. In addition, singular value decomposition was incorporated into the algorithms to alleviate the ill-posedness frequently encountered in performing backward reconstruction from the farfield to the nearfield. A pulsating sphere and a submarine-shaped source were adopted in numerical simulations to verify the developed spatial transformation algorithms. Excellent agreements were achieved between the transformed results and the analytical solutions.
    Journal of the Chinese Society of Mechanical Engineers, Transactions of the Chinese Institute of Engineers - Series C 01/1992; 13:145-160.