Download or read book Optimization of Two dimensional Airfoils for Application to High Efficiency Ground Vehicles written by Bruce Robert Dughi and published by . This book was released on 1991 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerodynamic Shape Optimization of Two dimensional Airfoils Under Uncertain Conditions written by Luc Huyse and published by . This book was released on 2001 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Summary of Low Speed Airfoil Data written by Michael S. Selig and published by Soartech. This book was released on 1995 with total page 320 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aerodynamic Shape Optimization of Two dimensional Airfoils Under Uncertain Conditions written by and published by . This book was released on 2001 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt: Practical experience with airfoil optimization techniques has revealed unexpected difficulties. Traditionally the performance of an airfoil is optimized for given, or assumed, model parameters. Experience has indicated that a deterministic optimization for discrete operating conditions may result in dramatically inferior performance when the actual conditions are difficulties different from these, somewhat arbitrarily chosen, design values. Extensions to multi-point optimization have proven unable to adequately remedy the problem of "localized optimization". This paper presents an intrinsically statistical approach and demonstrates how the shortcomings of multi-point optimization with respect to "localized optimization" can be overcome.

Download or read book Master s Theses Directories written by and published by . This book was released on 1992 with total page 688 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimization and Oscillation of a Two dimensional Bump to Enhance Airfoil Performance written by Dinesh Atchala and published by . This book was released on 2010 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Scientific and Technical Aerospace Reports written by and published by . This book was released on with total page 994 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book STAR written by and published by . This book was released on 1973 with total page 920 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Practical Aerodynamic Optimization of Airfoils and Wings written by James John Reuther and published by . This book was released on 1991 with total page 244 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Method for Optimizing Two dimensional Airfoils written by Thomas Anthony Cincotta and published by . This book was released on 1956 with total page 62 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Optimisation of the Kinematics of Flapping Airfoils for Micro Air Vehicle Applications written by Houssam Soueid and published by . This book was released on 2008 with total page 179 pages. Available in PDF, EPUB and Kindle. Book excerpt: The optimisation of the kinematics of a two-dimensional flapping airfoil is carried out by numerical simulation to identify flapping parameters capable to ensure high aerodynamic performances for a micro air vehicle application. Attention is focused on the lift and thrust and on the propulsive efficiency. The control variables are the amplitudes of the combined motions of heaving and pitching and the phase angle between them. Additionally, the flapping frequency and the mean angle of attack are considered. The optimal kinematics are compared to observations in nature on birds, insects and fish. The methodology is based on the solution of the flow field around a NACA0012 airfoil submitted to translational and angular oscillations. Then, the gradients of the cost functional with respect to the control parameters are evaluated thanks to the sensitivity technique and the complex step derivative method. The gradients are subsequently used in a quasi-Newton update algorithm to direct the solution towards its optimal value. Results show the ability of optimised flapping airfoils to produce large thrust and lift, with an acceptable efficiency. This is ensured when the pitching oscillations lead the heaving ones by a phase angle close to 90o and when the Strouhal number of oscillations is in the range [0.2, 0.4]. It is expected that the optimal efficiency would increase for higher Reynolds number, without much variation in the optimal kinematics. Furthermore, the drop in efficiency at high thrust forces may be limited by including higher order terms in the expression of heaving.

Download or read book Airfoil Optimization for Unsteady Flows with Application to High lift Noise Reduction written by Markus Peer Rumpfkeil and published by . This book was released on 2008 with total page 145 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Aeronautical Engineering written by and published by . This book was released on 1991 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Monthly Catalogue United States Public Documents written by and published by . This book was released on 1995 with total page 1732 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book NASA SP written by and published by . This book was released on 1993 with total page 590 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Technical Information Indexes written by United States. Naval Air Systems Command and published by . This book was released on 1976 with total page 276 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Shape Optimization for Two dimensional Transonic Airfoil by Using the Coupling of FEM and BEM written by Chol Gyu O and published by . This book was released on 2006 with total page 73 pages. Available in PDF, EPUB and Kindle. Book excerpt: