Heat transfer in 30 deg and 60 deg half-angle of convergence nozzles with various diameter uncooled pipe inlets
Heat transfer in convergent nozzles with various uncooled pipe inlets
HEAT TRANSFER↗
SEARCH · Engineering Papers
Results for “Convergent”
Search indexed NASA NTRS and DOE OSTI research on propulsion, heat transfer, battery materials and energy systems. Follow report and document links to the original sources.
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Investigation of drag and heat transfer during air motion in divergent and convergent nozzles
Experimental investigation of drag and heat transfer of turbulent airflow in divergent and convergent nozzles
TURBULENT AIR CURRENT↗
Convergence in the mean
Theorem proving for orthogonal systems of functions relative to convergence in mean of series
SERIES EXPANSION↗
Convergence of successive approximations to the scalar electrical conductivity of some weakly ionized real gases.
Convergence of Chapman-Enskog approximations to scalar electrical conductivity of some weakly ionized real gases
REAL GAS↗
Shock-wave strengthening by area convergence.
Shock wave strengthening by area convergence with viscous correction
SHOCK WAVE↗
A convergent algorithm for solving polynomial equations.
Zeros of polynomials with real or complex coefficients determined, using steepest descent method in convergent procedure
COMPUTER PROGRAM↗
Effect of uncooled inlet length and nozzle convergence angle on the turbulent boundary layer and heat transfer in conical nozzles operating with air.
Turbulent boundary layer and heat-transfer coefficients for air in conical nozzles, noting uncooled inlet length and convergence angle effects
NOZZLE FLOW↗
Apparent modifiability of receptive fields during accommodation and convergence and a model for size constancy.
Apparent modifiability of receptive fields during accommodation and convergence and model for size constancy
PSYCHOPHYSICS↗
The Role of the Confluence Matrix in Exponential Tracking Convergence of Overparametrized Adaptive Feedforward Systems
It is shown that persistent excitation (PE) conditions are overly stringent for ensuring exponential convergence of the tracking error in overparametrized adaptive feedforward systems.
Persistent Excitation Exponentia Convergence↗
Exponential Convergence in Feedforward Adaptive Systems Without Persistent Excitation
Conditions are investigated for exponential convergence of the tracking error in feedforward adaptive systems without persistent excitation.
persistent excitation parameter convergence adapti↗
Convergent Aeronautics Solutions Project
NASA is committed to transforming our aviation system to best meet demands and opportunities of the future. With a vision of safe, efficient, flexible, and environmentally sustainable air transportation, the NASA Aeronautics Research Mission Directorate is conducting research and development to address future needs of the aviation community, the Nation, and the world. While our NASA Aeronautics vision and strategy reaches into the next 25 years and beyond, we recognize that our vision and strategy must be responsive to new discoveries and emerging markets. For this reason, we are empowering our research community to redefine the future of aviation by dreaming up convergent/transformative ideas and studying if those ideas are possible. By modeling the new NASA Aeronautics' Convergent Aeronautics Solutions (CAS) Project after the venture capital community, we created opportunities for teams of intrapreneurs to mature their ideas into concepts through rapid feasibility studies. The CAS Project expects teams to consider the complexities and potential benefits of multi-disciplinary solutions and to leverage technology advances from outside the field of aeronautics. We also expect teams to explore their concepts in a rapid, iterative manner that allows them to learn and adjust their research approach. Within a year or two, teams are responsible for reporting on the feasibility of their concept. The findings inform NASA Aeronautics strategic planning and further investment. This presentation will give an overview of CAS.
Transformative↗
Exponential Tracking Error Convergence Bounds for Overparametrized Adaptive Feedforward Systems
Many practical adaptive feedforward systems are overparametrized and for this reason will not satisfy persistent excitation (PE) conditions. For these systems, a weaker PE condition is proposed under which it is shown that the tracking error (the error between the desired and estimated outputs) converges exponentially.
confluence↗
USE OF CONVERGENT AND DIVERGENT ILLUMINATION WITH PLANE GRATINGS
Convergent and divergent illumination with plane gratings
ILLUMINANCE↗
ON THE CONVERGENCE AND ERROR ESTIMATION OF THE ITERATIVE SOLUTION TO THE NONLINEAR BOLTZMANN EQUATION
Gas dynamics - convergence & error estimation of iterative solution to nonlinear boltzmann equation
ITERATIVE SOLUTION↗
Numerical solutions of free-molecule flow in converging and diverging tubes and slots
Numerical solutions of free molecular flow in converging and diverging tubes and slots
SLOT↗
Appraisal of the fopim fast-converging perturbation method.
Appraisal of practicality of first order perturbation-iteration method /FOPIM/, fast converging perturbation method for solving time independent quantum mechanical problems
PERTURBATION THEORY↗
An Appraisal of FOPIM Fast-converging Perturbation Method
Appraisal of first order perturbation iteration fast converging method
PERTURBATION↗
Transonic static and dynamic longitudinal stability characteristics of a low-fineness- ratio, blunted-cylinder reentry body having a converging-cone afterbody
Transonic static and longitudinal stability characteristics of low fineness ratio, blunted cylinder reentry body with converging cone afterbody
BLUNT BODY↗