Researches on the Influences of Common Rail Pressures on the Diesel Engine’s Sabah Cycle
Issue:
Volume 3, Issue 3, June 2018
Pages:
19-27
Received:
2 June 2018
Accepted:
6 July 2018
Published:
8 August 2018
Abstract: There are directly effects on diesel’s Sabah cycle of common rail pressure, at the same time, the common rail pressure also affects the property indices: pre-expansion ratio, thermal efficiency, exergy efficiency and average valid pressure. It takes Weicai National VI diesel as an instance, describes the simplifies, basic presumptions and formulas of inner cylinder thermal process, and mainly designs and researches on the property indices of Sabah Cycle in different common rail pressure conditions, includes: the rail pressure effects towards pressure inner cylinder, combustion temperature, etc.; and takes oil consumption as the optimizing target, optimized and gained the MAP of rail pressure, the oil consumption after optimizing are satisfied with the design requirements.
Abstract: There are directly effects on diesel’s Sabah cycle of common rail pressure, at the same time, the common rail pressure also affects the property indices: pre-expansion ratio, thermal efficiency, exergy efficiency and average valid pressure. It takes Weicai National VI diesel as an instance, describes the simplifies, basic presumptions and formulas ...
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Analytical Solutions of an MHD Heat and Mass Transfer of a Jeffery Fluid Flow over a Stretching Sheet with the Effect of Slip Velocity
Adamu Gizachew,
Bandari Shankar
Issue:
Volume 3, Issue 3, June 2018
Pages:
34-42
Received:
19 July 2018
Accepted:
13 August 2018
Published:
6 September 2018
Abstract: In this study, we have developed an analytic model to analyze the influence of velocity slip parameter and heat source on magneto hydrodynamics (MHD) heat and mass transfer of a Jeffery fluid which conducts electricity on a stretching surface. Both temperature and concentration are assumed to be in power low form. The existing partial differential equations (PDEs) is changed into a structure of ordinary differential equations (ODE's) by using a similarity variable. For computing the transformed equation, we used an analytical method named as Optimal Homotopy Asymptotic Method (OHAM). The influence of different dimensionless parameters on the velocity, temperature, concentration and as well as the coefficient of skin friction, Nusselt number and Sherwood number were evaluated using graphs and tables. It is observed that the velocity slip parameter (k) and the Deborah number (β) have opposite effects on the velocity distributions of the fluid flow. However, the effects of heat source parameter (δ) and thermal radiation parameter (R) on the temperature profile is similar. To be confident about the accuracy of this analytic method, the values of Nusselt number (Mux) solved numerically is compared with the previously published works done before and the comparison is found to be in a very good agreement.
Abstract: In this study, we have developed an analytic model to analyze the influence of velocity slip parameter and heat source on magneto hydrodynamics (MHD) heat and mass transfer of a Jeffery fluid which conducts electricity on a stretching surface. Both temperature and concentration are assumed to be in power low form. The existing partial differential ...
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