The Experts below are selected from a list of 27 Experts worldwide ranked by ideXlab platform

Bukac Hubert - One of the best experts on this subject based on the ideXlab platform.

  • Equivalent Linkages of Compressor Mechanisms
    'Purdue University (bepress)', 2014
    Co-Authors: Bukac Hubert
    Abstract:

    Frequently, the dynamics of a Compressor’s mechanism can be simplified and better understood by analyzing Compressor’s equivalent linkage. Although the equivalent linkage of a Reciprocating Piston Compressor is well known, the equivalent linkages of other types of Compressors are not. For example, it is not well understood that the equivalent linkage of a rolling Piston Compressor is also the same slider-crank mechanism as the one of a Reciprocating Piston Compressor. The difference between Reciprocating Piston Compressor and the rolling Piston Compressor is that it is the connecting rod that compresses gas in the cylindrical chamber. If the contact between the rolling Piston and the vane is flat, the equivalent linkage is the Scotch-Yoke mechanism. The difference between the two equivalent linkages of the same type of Compressor is in the type of contact between the vane and the rolling Piston. The equivalent linkage of a rotary vane Compressor is the rocker arm mechanism. The equivalent linkage of a scroll Compressor has two degrees of freedom and it has Oldham Ring. The equivalent linkages of other types of Compressor mechanisms can be readily found by using approach presented in the paper. Under usual assumption of constant angular velocity, the dynamic analysis of the equivalent linkage can be done in vector form. Thus, the vectors of velocities and accelerations may be projected into the direction of a chosen coordinates. Therefore, one will only need to know geometry of the linkage as a function of the angle of crank rotation. This approach enables to avoid cumbersome time derivatives

Hubert Bukac - One of the best experts on this subject based on the ideXlab platform.

  • Equivalent Linkages of Compressor Mechanisms
    2014
    Co-Authors: Hubert Bukac
    Abstract:

    Frequently, the dynamics of a Compressor’s mechanism can be simplified and better understood by analyzing Compressor’s equivalent linkage. Although the equivalent linkage of a Reciprocating Piston Compressor is well known, the equivalent linkages of other types of Compressors are not. Presented are equivalent linkages of Reciprocating-Piston Compressor, rolling-Piston Compressor, swing-Piston Compressor, rotary-vane Compressor, and the scroll Compressor. Because of the limited space detailed the analysis of a Reciprocating Piston Compressor is presented only.

Francesco Aloschi - One of the best experts on this subject based on the ideXlab platform.

  • Design of suction filter aimed to noise reduction of Reciprocating Piston Compressor
    2019
    Co-Authors: Francesco Aloschi
    Abstract:

    Air Piston Compressor is a Reciprocating machine that uses crack shaft mechanism to compress air. Usually this type of machine is quite noisy, typical noisy level are around 95[dB]. This project is meant to look for noise sources and study a strategy to reduce the sound emitted. Thesis work was developed thanks to technical support and resources of Atlas Copco group, company leader in air Compressor technique. One of the last machines designed in Atlas is Pat due machine, it will be the subject studied thought this research. This paper is meant to study the fluid dynamic noise source at Compressor inlet, a new inlet filter concept will be designed according to fluid dynamics laws and tested. Finally, this thesis works will develop a method to build new acoustic filter that can reduce the overall machine noise.

Yan Shi - One of the best experts on this subject based on the ideXlab platform.

  • Energy conversion characteristics of Reciprocating Piston quasi-isothermal compression systems using water sprays
    Science China Technological Sciences, 2018
    Co-Authors: Guanwei Jia, Maolin Cai, Yan Shi
    Abstract:

    Air Compressors are vital and have numerous industrial applications. Approximately 8% of the annual operating electricity consumption in industrial countries is constituted by due to the use of air Compressors. Because the poor heat transfer to the environment in the rapid compression process, the compression is non-isothermal, the efficiency of Compressors is restricted. To improve their efficiency and achieve isothermal compression, this study proposes energy conversion Reciprocating Piston quasiisothermal compression using a water spray. First, a mathematical model of a Reciprocating Piston Compressor with water sprays was established. Through experimental investigation and simulations, the mathematical model was validated. The energy conversion characteristics of the Reciprocating Piston Compressor were then studied. To reduce compression power and enhance compression efficiency, it was first discovered that the critical parameters were the input pressure of the driving chamber, water spray mass, and compression volume ratio, which were then evaluated thoroughly. The higher the inlet pressure of the driving chamber, the faster the air compression velocity. Additionally, the compression efficiency was elevated as the water spray mass was gradually increased for a given compression volume ratio. When the compression volume ratio was increased from 2 to 3, the compression power increased from 172.7 J/stroke to 294.2 J/stroke and the compression efficiency was enhanced from 37.3% (adiabatic) to 80.6%. This research and its performance analysis can be referred to during the parameter design optimisation of Reciprocating Piston quasi-isothermal compression systems using water sprays.

V Sishtla - One of the best experts on this subject based on the ideXlab platform.

  • Fully coupled fluid-structure interaction model of reed valves in a multi-cylinder Reciprocating Piston Compressor
    IOP Conference Series: Materials Science and Engineering, 2017
    Co-Authors: J Nieter, Alexander Lifson, Ramon Reba, V Sishtla
    Abstract:

    For years Compressor researchers have tried to account for the fluid interaction effect of the working fluid on valve motion in displacement Compressors. In recent years, the computing capacities and available CFD and FEA programs have allowed fully coupled interaction of fluids and moving structures to be modelled more comprehensively. This paper describes our experience and results from developing a model of a multi-cylinder Reciprocating Piston Compressor with suction and discharge valve systems that are fully coupled with the pressure pulsation in the adjacent plenum. Valve dynamics are captured by the model that affects Compressor performance. The results show that higher running speed causes more discharge valve delay on closing due to higher pressure pulsation in discharge plenum. The acoustic property of the discharge plenum as it relates to valve motion is studied by the developed cost-effective standalone model.