Download or read book A Non Contact Thermal Barrier Coating TBC Heat Flux Sensor Using a Self Calibrating Multiwavelength Pyrometer written by and published by . This book was released on 1996 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book A Self Calibrating Emissivity And or Transmissivity Independent Multiwavelength Pyrometer written by and published by . This book was released on 1996 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Non contact Heat Flux Measurement Using a Transparent Sensor written by Daniel Ng and published by . This book was released on 1993 with total page 14 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Temperature Measurement Involving Nanostructured Thermal Barrier Coating Using a Multiwavelength Pyrometer written by and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Temperature measurement involving nanostructured thermal barrier coating using a multiwavelength pyrometer written by Daniel L. Ng and published by . This book was released on 1996 with total page 11 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of the Self Calibrating Emissivity And or Transmissivity Independent Multiwavelength Pyrometer in an Intense Ambient Radiation Environment written by and published by . This book was released on 1996 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book REMOTE HEAT FLUX MEASUREMENT USING A SELF CALIBRATION MULTIWAVELENGTH PYROMETER AND A TRANSPARENT MATERIAL NASA TM 1998 208809 MAR 1 1999 written by United States. National Aeronautics and Space Administration and published by . This book was released on 1999* with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Remote Heat Flux Using a Self Calibration Multiwavelength Pyrometer and a Transparent Material written by Daniel Ng and published by . This book was released on 1998 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Application of the Self Calibrating Emissivity And Or Transmissivity Independent Multiwavelength Pyrometer in an Intense Ambient Radiation Environment written by National Aeronautics and Space Administration (NASA) and published by Createspace Independent Publishing Platform. This book was released on 2018-08-17 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The NASA self calibrating multiwavelength pyrometer is a recent addition to the list of pyrometers used in remote temperature measurement in research and development. The older one-color, two-color, and the disappearing filament pyrometers, as well as the multicolor and early multiwavelength pyrometers, all do not operate successfully in situations in which strong ambient radiation coexists with radiation originating from the measured surface. In such situations radiation departing from the target surface arrives at the pyrometer together with radiation coming from another source either directly or through reflection. Unlike the other pyrometers, the self calibrating multiwavelength pyrometer can still calibrate itself and measure the temperatures in this adverse environment. Ng, Daniel Glenn Research Center NASA-TM-107151, E-10089, NAS 1.15:107151 RTOP 505-62-50...

Download or read book Application of the Self Calibrating Emissivity And or Transmissivity Independent Multiwavelength Pyrometer to Measure the Temperatures of Tungsten and Refractory Material Surfaces written by and published by . This book was released on 1996 with total page 26 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Multi wavelength Pyrometric Systems for Emissivity independent Non contact Temperature Sensing written by Michael B. Kaplinsky and published by . This book was released on 1997 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt: A Multi-Wavelength Imaging Pyrometer (M-WIP) for real-time remote sensing of temperature profiles of targets with unknown emissivity was developed and demonstrated. To measure the spectral radiance of a target at several distinct wavelengths an M-WIP system was implemented based on an 320x122-element PtSi IR-CCD imager with an assembly of 7 narrow-band 1k filters in the range from 1790nm to 4536nm. A real-time algorithm for simultaneous estimation of the temperature and model parameters of the target emissivity from the least-squares fit of the theoretical model of 1k camera output signal to the experimental spectral measurements was developed and implemented. This rea1-time least-squares minimization was accomplished by combination of Levenberg-Marquardt and simulated annealing algorithms. The least-squares-based calibration algorithm was developed for evaluation of effective values of peak transmissions and center wavelengths of M-WIP channels based on the detection of radiation from pre-calibrated blackbody source. To achieve high radiometric accuracy, compensation for the dark current charge as function of the detected signal level was implemented. The effect of the response non-linearity of IR imager was minimized by developing an algorithm for imager operation at fixed pre-selected signal level for each M-WIP spectral channel based on adaptive control of the duration of the optical integration time of the imager. Initial testing demonstrated an accuracy of ±l.0°C for real-time temperature measurements of the center of the blackbody aperture in the range from 500°C to 1000°C. Temperature resolution of ±3°C was demonstrated for the blackbody source viewed through a double side polished silicon wafer with unknown spectral transmissivity in the temperature range from 500°C to 900°C.

Download or read book Non Destructive Evaluation of Thermal Barrier Coatings Using Direct Heat Flux Method written by Amadeusz Adam Nasuta and published by . This book was released on 2019 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Thermal barrier coatings are essential for reliable and efficient turbine engines. The coatings allow the engine to operate at higher temperatures and protect the super alloy components within the hot section. Turbine hot section components have complex geometries. Complex geometries can lead to inconsistent coatings. It is critical to determine which components have defective coatings because engine manufacturers warranty these parts and under life parts have large costs associated with them. Non-destructive detection of damage progression is useful for accurate part lifetime prediction and also in root cause analysis. The present thesis describes a new, non-destructive approach to test thermal barrier coatings. The approach was implemented using custom hardware. In initial testing, defects were successfully detected under a thermal barrier coating as well as under both a thermal barrier coating and bond coat. The approach is based on obtaining temperature maps of the coating on the surface with a long-wavelength IR camera and temperature maps of the metal to ceramic interface with a mid-wavelength IR camera. This separation is possible due to the spectral absorption properties of the thermal barrier coating. This work delivers a first proof-of-concept non-destructive detection for defects in thermal barrier coatings.

Download or read book Thermal Barrier Coatings TBC s for High Heat Flux Thrust Chambers written by Christopher Michael Bradley and published by . This book was released on 2013 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book High Temperature Sensing of Thermal Barrier Materials by Luminescence written by Molly Maureen Gentleman and published by ProQuest. This book was released on 2006 with total page 274 pages. Available in PDF, EPUB and Kindle. Book excerpt: The basis for a number of concepts for in situ monitoring of thermal barrier coating heath and temperature using non-contact luminescence techniques is described. Restrictions imposed by phase compatibility and the optical properties of the coating materials are discussed as guidelines for the selection of rare-earth ions as chromophore dopants in these sensors. Extensive studies of type and concentration of rare-earth doping lead to the selection of Eu-doped materials as the preferred material for temperature sensing. Sensor layers, consisting of 1 atomic percent europia-doped yttria stabilized zirconia were deposited and exposed to high heat flux conditions similar to those seen today's turbine environments and were shown to be capable of measuring temperature at different depths within the coating.

Download or read book Heat Transport Through Thermal Barrier Coatings written by Liguo Chen and published by ProQuest. This book was released on 2008 with total page 158 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The present study deals with heat transport phenomena through thermal barrier coatings and consists of two parts. The first part focuses on the radiation properties of semitransparent materials and the effect of radiation on the temperature distributions within a TBC. The second part focuses on measuring thermal diffusivity of materials. A new data reduction, numerical method is introduced and several important aspects related to the accuracy of the thermal diffusivity measurement of monolithic and coated materials by thermal flash technique are highlighted."--Page vi

Download or read book The Electric Furnace written by Henri Moissan and published by . This book was released on 1904 with total page 334 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Measurements in Heat Transfer written by Ernst R. G. Eckert and published by Taylor & Francis. This book was released on 1976 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt: