http://hdl.handle.net/2440/38934 2013-05-25T09:06:53Z http://hdl.handle.net/2440/71043 Title: Design of the grand touring sports car wing Author: Marqués-Bruna, Pascual; Grimshaw, Paul Norman Abstract: This study evaluated the adaptation of natural laminar flow airfoils forGrandTouring (GT) sports car racing and the influence of wing geometry and flow control devices on rear-wing aerodynamics. The mean camber lines for the National Advisory Committee for Aeronautics (NACA) 651-412 and National Aeronautics and Space Administration (NASA) LS(1)-0413 airfoils were calculated. Numerical analysis was conducted using thin-airfoil theory and finite-wing theory. Airfoil variables included zero-lift angle of attack and centre-of-pressure location. Wing variables encompassed induced and effective angles of attack, lift and drag coefficients, and lift-to-drag ratio. Modelling consisted of variations in wing aspect ratio and the integration of end plates and a Gurney flap. A tapered rectangular planform is quasi-elliptical and attains near-unity Oswald efficiency. The NASA LS(1)-0413 airfoil is stall resistant and produces high downforce at the expense of extra drag because of factors related to camber, profile thickness, leading edge radius, and concave pressure recovery. The wing should be set at an incidence above that for best lift-to-drag ratio. The NACA 651-412 airfoil is aerodynamically more efficient but produces less downforce and may be used as a stabilizer. Augmented aspect ratio, end plates, and a Gurney flap enhance wing aerodynamics via flow control and modified downwash configuration. Theanalysis suggests that a tapered LS(1)-0413 wing of 5.56 aspect ratio fitted with end plates and a Gurney flap, set at high incidence, is an appealing single-element arrangement for applications in Grand Touring sports car engineering. 2010-12-31T13:30:00Z http://hdl.handle.net/2440/22490 Title: A residual strength approach for the fatigue analysis of welded components / Abir Ghosh. Author: Ghosh, Abir Abstract: The main objective of this research is to develop a fundamentally new fatigue design and assessment procedure which can be used to predict the variation in crack size, strength and inspection periods as well as endurances. Basic fracture mechanics and fatigue procedures are used to illustrate this new technique. Description: Bibliography: leaves 240-257.; xvii, 274 leaves : ill. ; 30 cm.; Title page, contents and abstract only. The complete thesis in print form is available from the University Library. 1995-12-31T13:30:00Z http://hdl.handle.net/2440/22043 Title: Predicting weld cooling rates and the onset of failure during in-service welding / Prakash N. Sabapathy. Author: Sabapathy, Prakash Niranjan Abstract: Concerns the specialized requirements of welding procedures used on operational gas pipelines. Description: "1st February 2002"; Includes bibliographical references (leaves 265-273); xi, 273 leaves : ill. (some col.), plates (col.) ; 30 cm.; Title page, contents and abstract only. The complete thesis in print form is available from the University Library. 2001-12-31T13:30:00Z http://hdl.handle.net/2440/21895 Title: Understanding the influence of alloy aditions on microstructure and mechanical properties of weld metal from gas-shielded processes / by Vinay K. Tyagi. Author: Tyagi, Vinay Kumar Description: "May 2002"; Includes bibliographical references (leaves 210-229); xxvi, 368 leaves : ill. ; 30 cm.; Title page, contents and abstract only. The complete thesis in print form is available from the University Library. 2001-12-31T13:30:00Z