International Journal of Energy and Power Engineering

Volume 5, Issue 4, July 2016

  • It Is Necessary to Abrogate All the International Basic Standards of Seals

    Xu Changxiang, Zhang Xiaozhong, Chen Youjun

    Issue: Volume 5, Issue 4-1, July 2016
    Pages: 1-12
    Received: 22 June 2016
    Accepted: 25 June 2016
    Published: 24 August 2016
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    This article belongs to the Special Issue Xu’s Sealing and Flowing Theories of Fluids
    Abstract: According to definitions in the international standard JCGM 200, physical quantities, divided into base quantity and derived quantity, are a property of a phenomenon, body, or substance, where the property has a magnitude that can be expressed as a number and a reference (a measurement unit); a base quantity cannot be expressed in terms of the othe... Show More
  • New Explanations of Common Applications and Demonstrations of Changes in Pressure with Velocity of a Fluid Current

    Xu Changxiang, Zhang Xiaozhong, Chen Youjun

    Issue: Volume 5, Issue 4-1, July 2016
    Pages: 13-21
    Received: 22 June 2016
    Accepted: 25 June 2016
    Published: 24 August 2016
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    This article belongs to the Special Issue Xu’s Sealing and Flowing Theories of Fluids
    Abstract: Movements are relative. The rapid flowing of a fluid through a wall-bulged passage of pipes at a certain pressure can be regarded as a movement of the bulged wall relative to a static fluid in a certainly pressurized pipe. The axial movement of a cylindrical object in the atmosphere and the water whose free inherent pressure is not influenced can b... Show More
  • Pressure Energy, Resistance and Reactance in Fluid Leak & Flow

    Xu Changxiang, Zhang Xiaozhong, Chen Youjun

    Issue: Volume 5, Issue 4-1, July 2016
    Pages: 22-30
    Received: 22 June 2016
    Accepted: 25 June 2016
    Published: 24 August 2016
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    This article belongs to the Special Issue Xu’s Sealing and Flowing Theories of Fluids
    Abstract: The fluid current in a fluid circuit, corresponding to the electrical current in an electrical circuit, is determined by a fluid pressure corresponding to electrical pressure (voltage), and a fluid impedance corresponding to electrical impedance, and directly proportional to the fluid pressure and inversely proportional to the fluid impedance betwe... Show More
  • Definition, Quantifying and Gauging of Tightness

    Xu Changxiang

    Issue: Volume 5, Issue 4-1, July 2016
    Pages: 31-34
    Received: 22 June 2016
    Accepted: 25 June 2016
    Published: 24 August 2016
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    This article belongs to the Special Issue Xu’s Sealing and Flowing Theories of Fluids
    Abstract: A leakage for fluid in a pressure vessel to flow through its sealing joint to the atmosphere is just like a leakage for electric charges in a capacitor to flow through its insulator to the ground, and hence there is a sealing law for pressure vessels that is completely similar to Ohm's law, stating the leakage current IL flowing through a sealing j... Show More
  • Xu's Designs and Parameters for Sealing Elements

    Xu Changxiang

    Issue: Volume 5, Issue 4-1, July 2016
    Pages: 35-42
    Received: 22 June 2016
    Accepted: 25 June 2016
    Published: 24 August 2016
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    This article belongs to the Special Issue Xu’s Sealing and Flowing Theories of Fluids
    Abstract: Any leak-free achievement needs a sealing surface that has microcosmic irregularities fully complementary to a surface to be sealed and that can be qualified only by compressive working or installing in position. ASME Code mistakes the working stress needed to result in a qualified gasket in installation for the stress needed to enable a qualified ... Show More
  • Xu's Sealing Theory and Rectangular & O-Shaped Ring Seals

    Xu Changxiang

    Issue: Volume 5, Issue 4-1, July 2016
    Pages: 43-58
    Received: 22 June 2016
    Accepted: 25 June 2016
    Published: 24 August 2016
    Downloads:
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    This article belongs to the Special Issue Xu’s Sealing and Flowing Theories of Fluids
    Abstract: The difficulty for a sealing element to create and maintain a leak-free joint is determined by its sealing difficulty factor m1, m1 = elastic modulus Ec of its sealing contact layer/elastic modulus Es of its sealing contact layer substrate. Therefore, theoretically the contact layer of a sealing element shall be soft & inelastic and assembled up to... Show More