D: Aerospace Science (9)
GJRE: D
Aerodynamic Characteristics of a Real 3D Flow around a Finite Wing
Published In: GJRE Part: D: Aerospace Science Volume: 14 Issue: 1
This paper presents a new method of solution for the aerodynamics of finite-span wings, which overcomes the difficulties of the previous methods. A lot of disturbance is created in the air when an aeroplane flies. It is through the study of these disturbances of the flow past the airfoil, lots of design considerations are done. In this paper, we design a 3D air wing and solve the flow eq...
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Authors Sanjay Kumar Sardiwal, Md. Abdul Sami , B.V.Sai Anoop, Syed Arshad Uddin, Gudipudi Susmita, Lahari VooturiRead Journal Click Here
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Page No. 19 to 28
Advanced Composite Materials in Typical Aerospace Applications
Published In: GJRE Part: D: Aerospace Science Volume: 14 Issue: 1
Composites are becoming increasingly important in the aerospace industry. At least 30-40 per cent of modern airframes are now made of composites, and this percentage is increasing rapidly due to technological advances in the field. The use of composites for primary structures such as fuselages and wings has grown significantly in transport aircraft. Apart from increased strength at lower...
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Authors Sanjay Kumar Sardiwal, Md. Abdul Sami, B.V.Sai Anoop, Gudipudi Susmita,Lahari Vooturi Syed Arshad UddinRead Journal Click Here
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Page No. 5 to 10
Principle of Quasi Work and its Import on Structural Analysis
Published In: GJRE Part: D: Aerospace Science Volume: 14 Issue: 1
Discrete structural models, as a basis for evolving a new design methodology, created the need for considering structural configuration as a variable. Existing energy methods and variational principles do not provide analysis link between pairs of structural configurations, whereas Principle of Quasi Work addresses this need. This is proved for discrete structural models by adapting Tell...
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Authors Inder Krishen PandittaRead Journal Click Here
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Page No. 11 to 17
Design and Analysis of Transonic Wind Tunnel
Published In: GJRE Part: D: Aerospace Science Volume: 14 Issue: 1
The Transonic Wind Tunnel is used to test aircraft models at speeds from Mach number 0.2 to 1.4. Transonic flows consist of mixed subsonic and supersonic flow regions. Shocks can occur in these flows but often do not have a strong enough pressure gradient to assume flow properties similar to those of supersonic flows. These regions are difficult to model mathematically because they have ...
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Authors T. Kumaraswamy, V.V.S. Nikhil Bharadwaj, Parthasarathy GarreRead Journal Click Here
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Page No. 1 to 4
On dynamics of a landing gear mechanismwith torsional freeplay
Published In: GJRE Part: D: Aerospace Science Volume: 12 Issue: 1
In this study, dynamics of a landing gear mechanism with torsional degree of freedom and torsional freeplay is analyzed. Derivation of the equations of motion of the model with torsional degree of freedom and the von Schlippe tire model are presented. Freeplay is introduced into the model and effects of freeplay angles of 0 º, 0.5º, 1º and 1.5º are observe...
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Authors Dr. Elmas Atabay, Ibrahim OzkolRead Journal Click Here
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Page No. 35 to 49
Stability analysis of a landing gear mechanismwith torsional degree of freedom
Published In: GJRE Part: D: Aerospace Science Volume: 12 Issue: 1
In this study, stability of a landing gear mechanism with torsional degree of freedom is analyzed. Derivation of the equations of motion of the model with torsional degree of freedom and the von Schlippe tire model are presented. Nonlinear model is linearized and Routh-Hurwitz criterion is applied. Stability analysis is conducted in the e-v plane for different values of the torsional spr...
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Authors Dr. Elmas Atabay, Ibrahim OzkolRead Journal Click Here
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Page No. 17 to 27
Relativistic Elasticity & The Universal Equation of Elasticity for Next Generation Aircrafts & Spacecrafts
Published In: GJRE Part: D: Aerospace Science Volume: 12 Issue: 1
The theory of “Relativistic Elasticity†is proposed for the design of the new generation large aircrafts with turbojet engines and speeds in the range of 50,000 km/h. This theory shows that there is a considerable difference between the absolute stress tensor and the stress tensor of the moving frame even in the range of speeds of 50,000 km/h. For bigger spee...
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Authors Prof. Evangelos LadopoulosRead Journal Click Here
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Page No. 1 to 10
LQ Previewed Tracking for Biproper Systems
Published In: GJRE Part: D: Aerospace Science Volume: 12 Issue: 1
In linear quadratic previewed control, strictly proper systems are used for tracking performance by the feedforward control proportional to the measurable exogenous input. However, state space models that employ sensors to measure exogenous inputs are sometimes biproper. A classical example for biproper system is a small aircraft regulation in cruise condition where the gust inputs are m...
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Authors Chimpalthradi R. AshokkumarRead Journal Click Here
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Page No. 29 to 34
Robust Algorithms for Formation Flying Reconfiguration
Published In: GJRE Part: D: Aerospace Science Volume: 12 Issue: 1
Over the last 20 years spacecraft formation flying has been the subject of numerous research activities due to the advantages offered when compared with large, complex, single purpose satellites. With the obvious advantages of increased functionality and enhanced reliability, come however, also substantial challenges in the maintenance and reconfiguration of the spacecraft formation. The...
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Authors Dr. Gianmarco Radice, Tao Yang, Weihua ZhangRead Journal Click Here
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Page No. 11 to 15
