Content of Historiettes in mechanics in our journal

        Published in last 1 year |  In last 2 years |  In last 3 years |  All
    Please wait a minute...
    For Selected: Toggle Thumbnails
    THE HISTORICAL CONTRIBUTION OF BERNOULLI'S EQUATION TO THE ESTABLISHMENT OF FLUID MECHANICS THEORY
    LIU Peiqing, ZHAO Yunke
    Mechanics in Engineering    2020, 42 (2): 258-264.   DOI: 10.6052/1000-0879-19-179
    Abstract274)   HTML14)    PDF(pc) (2308KB)(173)       Save

    The famous energy equation for the steady flow of ideal fluids, the Bernoulli equation, has contributed greatly to the fluid mechanics since its publication. Based on the connotation of Bernoulli equation, this paper discusses its successful application in hydrostatics, steady orifice outflow, pitot tube velocity measurement, venturi flow and airfoil flow. At the same time, the modeling of the local following fluid particles is suggested by Bernoulli equation. It is summarized by Euler as the flow field method describing the fluid motion, which is the basic basis for deriving the Euler equations and the NS equations. It also laid the foundation for the establishment of the later turbulence theory, boundary layer theory, aerodynamic noise and other theories.

    Table and Figures | Reference | Related Articles | Metrics
    Mechanics in Engineering    2020, 42 (2): 255-257.  
    Abstract89)   HTML1)    PDF(pc) (146KB)(71)       Save
    Reference | Related Articles | Metrics
    THE ESTABLISHMENT PROCESS OF INTERNATIONAL UNION OF THEORETICAL AND APPLIED MECHANICS
    WANG Zhendong, JIANG Nan, YANG Shaoqiong
    Mechanics in Engineering    2020, 42 (2): 249-254.   DOI: 10.6052/1000-0879-20-119
    Abstract89)   HTML3)    PDF(pc) (10364KB)(44)       Save

    Based on the historical data, this paper briefly describes the establishment process of the International Union of Theoretical and Applied Mechanics (IUTAM) and some stories of the Chinese Society of Theoretical and Applied Mechanics (CSTAM) joining the International Union of Theoretical and Applied Mechanics in 1980 , which can be used as a reference for readers to study the history of mechanics.

    Table and Figures | Reference | Related Articles | Metrics
    DERIVATION OF LIFT, DRAG AND THE KUTTA--JOUKOWSKI THEOREM FOR AIRCRAFTS 1)
    LIU Peiqing, GUO Zhifei
    Mechanics in Engineering    2019, 41 (6): 739-744.   DOI: 10.6052/1000-0879-19-162
    Abstract514)   HTML12)    PDF(pc) (2078KB)(303)       Save

    Several fundamental concepts and laws in aerodynamics are introduced and summarized in the article. Lift and drag are the two components of the air's force on the object respectively. They are caused by the relative motion of the object and the air, and proportional to the square of the speed of the motion. The Kutta-Joukowski theorem gives the relationship between the airfoil lift and the airfoil flow, and sparked the study of airfoil performance in the early 20th century. Furthermore, the contradiction between the calculation conclution of the inviscid flow around a cylinder and the experimental observations inspired the study of the viscous flow motion, therefore the Navier--Stokes equation was born. Then Prandt proposed the concept of boundary layer and skillfully solved the relationship between local flow and overall flow. For the wings with large aspect ratio, Prandt proposed a lift surface model based on the lift line assumption, which can obtain the aerodynamic performance of the wing based on the performance of the airfoil.

    Table and Figures | Reference | Related Articles | Metrics
    Mechanics in Engineering    2018, 40 (1): 98-105.  
    Abstract196)   HTML3)    PDF(pc) (11914KB)(468)       Save
    Reference | Related Articles | Metrics