Aggarwala

Andrew S. Aggarwala, East Hartford, CT US

Patent application number	Description	Published
20090162204	HIGH LIFT TRANSONIC TURBINE BLADE - A turbine blade system including a blade airfoil having an airfoil shape with the blade airfoil having a nominal profile substantially in accordance with normalized Cartesian coordinate values Z set forth in a table 1 below and which values are dimensionless values that are convertible to corresponding absolute distance values that define nominal airfoil profile sections and which, when joined smoothly with adjacent ones thereof, form a complete nominal airfoil shape that is substantially matched by the airfoil shape of the blade airfoil. This blade airfoil can be supported on a ring platform having a support surface with a support surface shape in the vicinity of the location at which that blade airfoil is supported thereon formed in a similar manner.	06-25-2009

Patent application number	Description	Published
20090148299	AIRFOIL LEADING EDGE SHAPE TAILORING TO REDUCE HEAT LOAD - An airfoil includes a leading edge surface that includes a non-continuous curvature distribution. A stagnation region of the airfoil includes a curvature larger than adjacent segments to reduce heat transfer into the airfoil. The reduced curvature in the stagnation region is surrounded by the adjacent segments with larger curvatures to tailor the airfoil surface to provide a desired balance between heat transfer properties and aerodynamic performance.	06-11-2009
20110135482	TIP VORTEX CONTROL - A rotor blade for a gas turbine engine includes an attachment and an airfoil. The airfoil has a stagger angle, a base region, a transition region and a tip region. The stagger angle changes as the airfoil extends between the attachment and a tip. The base region is disposed adjacent to the attachment. The transition region is located between the base and the tip regions. A rate of the change of the stagger angle in the transition region is greater than a rate of the change of the stagger angle in the base region. The rate of the change of the stagger angle in the transition region is greater than a rate of change of the stagger angle in the tip region.	06-09-2011

Patent application number	Description	Published
20100007850	APPARATUS AND METHOD FOR SUBJECTIVE DETERMINATION OF THE REFRACTIVE ERROR OF THE EYE - The invention provides for a subjective refractor for determining refractive error of the eye comprising an optical system for presenting at least two targets to the eye, the difference of focus between the targets greater than the predicted depth of focus of the eye; —means for indicating target preference from the presented targets; and means for determining refractive error of the eye on the basis of target preference.	01-14-2010