Sharif Digital Repository

Drag reduction by a multi-point optimised hybrid flow control method for two supercritical airfoils

Author

Nejati, A.

Publisher

Taylor and Francis Ltd

Pub. Year

2016

Subjects

Multi-point adjoint optimisation. / Aerodynamics. / Airfoils. / Boundary layer flow. / Boundary layers. / Drag. / Drag reduction. / Flow control. / Flow separation. / Transonic aerodynamics. / Transonic flow. / Adjoints. / Aero-dynamic performance. / Aerodynamic efficiency. / Boundary layer thickness. / Flow control methods. / Shock-wave/boundary layer interactions. / Suction and blowing. / Supercritical airfoils. / Shock waves.

Performance improvement of a supercritical airfoil by a multi-point optimized shock control channel

Author

Nejati, A.

Pub. Year

2017

Subjects

Multi-point adjoint optimization. / Shock control channel. / Shock wave. / Supercritical airfoil. / Aerodynamics. / Airfoils. / Angle of attack. / Boundary layers. / Drag. / Drag reduction. / Flow control. / Optimization. / Shock absorbers. / Transonic flow. / Adjoint optimizations. / Aerodynamic efficiency. / Flow control methods. / Off design condition. / Optimization algorithms. / Shock control. / Supercritical airfoils. / SWBLI. / Shock waves.

Application of the adjoint optimisation of shock control bump for ONERA-M6 wing

Author

Nejati, A.

Pub. Year

2017

Subjects

Adjoint optimisation method. / Shock control bump. / Three-dimensional bump. / Transonic wing. / Aerodynamic configurations. / Aerodynamic drag. / Aerodynamics. / Airfoils. / Boundary layer flow. / Boundary layers. / Drag. / Drag reduction. / Numerical methods. / Shock absorbers. / Shock waves. / Transonic aerodynamics. / Aero-dynamic performance. / Boundary layer velocity. / Numerical investigations. / Optimisation method. / Shock control. / Shock-wave/boundary layer interactions. / Three-dimensional flow structure. / Transonic wings. / Shape optimization.

Performance improvement of a supercritical airfoil by a multi-point optimized shock control channel

Author

Nejati, A.

Publisher

Springer Netherlands,

Pub. Year

2018

Subjects

Multi-point adjoint optimization. / Shock control channel. / Shock wave. / Supercritical airfoil. / Aerodynamics. / Airfoils. / Angle of attack. / Boundary layers. / Drag. / Drag reduction. / Flow control. / Optimization. / Shock absorbers. / Transonic flow. / Adjoint optimizations. / Aerodynamic efficiency. / Flow control methods. / Off design condition. / Optimization algorithms. / Shock control. / Supercritical airfoils. / SWBLI. / Shock waves.

Comparison between backstepping and input-output linearization techniques for pH process control

Author

Nejati, A.

Pub. Year

2012

Subjects

Globally linearizing controller. / Adaptive backstepping. / Backstepping technique. / Experimental studies. / Full-order models. / Input output linearization. / Load rejections. / PH control. / Ph process control. / Reduced order models. / Set-point tracking. / State estimator designs. / State measurements. / Work performance. / Backstepping. / Computer simulation. / Controllers.

Multivariable control strategy for autonomous operation of a converter-based distributed generation system

Author

Nejati, A.

Pub. Year

2011

Subjects

Autonomous operations. / Balanced loads. / Constant frequency. / Constant magnitude. / Control strategies. / DG system. / DG unit. / Distributed generation system. / Distributed generation units. / Islanded mode. / Linearized models. / Load resistances. / Load voltages. / LTI systems. / Multi variables. / Multivariable control. / Non-linear model. / Nonlinear simulations. / Nyquist. / Operating points. / Reference signals. / Robust tracking. / Simulation result. / Sinusoidal voltage. / Distributed power generation. / Linearization. / Nonlinear equations. / Power transmission. / Controllers.

A two-dimensional approach to evaluate the scientific production of countries (case study: The basic sciences)

Author

Nejati, A.

Pub. Year

2010

Subjects

Basic science. / Quality. / Quantity. / Scientific production.

Adaptive nonlinear control of pH neutralization processes using fuzzy approximators

Author

Salehi, S.

Pub. Year

2009

Subjects

Adaptive control. / Adaptive control schemes. / Adaptive nonlinear control. / Approximators. / Asymptotical stability. / Composition measurements. / Experimental studies. / Fuzzy logic system. / Fuzzy logic systems. / Load rejections. / Nonlinear control. / pH control. / PH neutralization process. / PI Controller. / Set-point tracking. / Uniformly ultimately bounded. / Controllers. / Fuzzy control. / Fuzzy logic. / Fuzzy sets. / Nonlinear control systems. / Predictive control systems. / System stability. / Adaptive control systems.

Adaptive input-output linearization control of pH processes

Author

Nejati, A.

Pub. Year

2008

Subjects

pH control. / Exact linearization. / Nonlinear state estimator. / Least-squares identification.

Algorithms for biobjective shortest path problems in fuzzy networks

Author

Mahdavi, I.

Pub. Year

2011

Subjects

Biobjective shortest path. / Dynamic programming. / Fuzzy network. / Fuzzy ranking methods. / Labeling method.

Contribution of steel fiber as reinforcement to the properties of cement-based concrete: a review

Author

Najigivi, A.

Pub. Year

2017

Subjects

Concrete. / Steel fiber. / Cements. / Compressive strength. / Concretes. / Mechanical properties. / Physical properties. / Reinforcement. / Strength of materials. / Tensile strength. / Concrete matrix. / Deformation characteristics. / Fresh properties. / High performance cements. / High strength. / Physical and mechanical properties. / Propagation of cracks. / Reinforcing materials. / Steel fibers.

Effect of microstructural constituents on the thermal fatigue life of A319 aluminum alloy

Author

Firouzdor, V.

Pub. Year

2007

Subjects

Thermal fatigue resistance. / Thermal-shock fatigue. / Thermo-mechanical fatigue. / Aluminum alloys. / Aluminum alloys. / Brittleness. / Crack propagation. / Intermetallics. / Metallographic microstructure. / Porosity. / Thermal fatigue. / Volume fraction. / Thermal shock.

Immobilization of cellulase on non-porous ultrafine silica particles

Author

Afsahi, B.

Publisher

Sharif University of Technology,

Pub. Year

2007

Subjects

pH. / Thermodynamic stability. / Cellulase. / Glutaraldehyde. / Ultrafine silica particles. / Crosslinking. / Enzyme immobilization. / Purification. / Ammonium sulfate. / Enzyme. / Immobilization. / Silica. / Hypocrea jecorina. / Adsorption. / Temperature.