Journal of The Japan Society for Aeronautical and Space Sciences 

About: Journal of The Japan Society for Aeronautical and Space Sciences is an academic journal published by The Japan Society for Aeronautical and Space Sciences. The journal publishes majorly in the area(s): Supersonic speed & Wind tunnel. It has an ISSN identifier of 1344-6460. Over the lifetime, 1751 publications have been published receiving 4035 citations. The journal is also known as: Journal of the Japan Society for Aeronautical and Space Sciences.

Composite Materials for Aircraft Structures.

Abstract: static and dynamic response of beam and plate structures.5,12,13 It is the used to model different composite materials, embedding strategies, and structure types. . ABAQUS is also capable of modeling laminated composite materials with . 1. COMPOSITE STRUCTURES. OF STEEL AND CONCRETE. VOLUME 1 3.11.2 Composite beam-shear connection and transverse reinforcement . This volume provides an introduction to the theory and design of composite structures of . FEA of composite structures where DIGIMAT-MF is used to model the nonlinear, anisotropic and defined material at each relevant integration point of Abaqus's FE mesh. . composite structures under quasi-static and dynamic loading. Chapter

Nonlinearity of the Aerodynamic Characteristics of NACA0012 Aerofoil at Low Reynolds Numbers

Abstract: Aerodynamic characteristics of NACA0012 airfoil at low Reynolds numbers (Re=1.0×104∼1.0×105) are measured systematically to clarify nonlinearity of the aerofoil characteristics. The variation of the lift curve with the angle of attack is divided into 5 sub-regions; the gradient of the lift curve much depends on the incident angle. Negative values of the gradient of lift coefficient are observed at lower angles of attack in a Reynolds numbers range. The sub-regions are summarized in a diagram of angle of attack and Reynolds numbers. The coefficients of drag and moment around 0.25 chord length have also unique characteristics.

Unsteady flows in a semi-infinite expanding pipe with injection through wall

Abstract: A theoretical analysis of the unsteady incompressible laminar flow in a semi-infinite porous circular pipe with injection or suction through the pipe wall whose radius varies with time is presented. The present analysis simulates the flow field by the burning of inner surface of cylindrical grain in a solid rocket motor, in which the burning surface regresses with time. An exact similar solution of fully non-linear form of the Navier-Stokes equation is calculated numerically. The flow field can be subjected to expanding coefficient of pipe wall α(=aa/ν) and injection parameter R=aV/ν. The properties of flow such as velocity components are represented as functions of expanding coefficient and injection parameter. Concludingly, the effect of burning surface regression on the flow field in combustion chamber of a solid rocket motor is so little that it may be negligible.

Breakdown Structure of Longitudinal Vortices along a Concave Wall

Abstract: The breakdown structure of longitudinal vortices in a boundary layer along a concave wall of 1m in radius of curvature is studied experimentally under main air flow velocity of 2.5 m/s. The flow patterns are observed by lightoil vapour with stroboscope, and the mean velocity and the turbulence intensity are measured by a hot-wire anemometer. In the upstream reagion, every couple of the vortices forms periodic high-frequency horseshoe-type vortices, which bring about dominant behaviour in the outer layer. In the downstream reagion, it is observed that high-intensity irregular fluctuations are generated beneath the horseshoe-type vortices in the inner layer. Therefore, the longitudinal vortices are broken down, and the boundary layer transition is also hastened downstream.