Experimental study of static calibration based on atomic- emission double spectrum line temperature measuring

2018 ◽  
Author(s):  
Yunan Guo ◽  
Xiaojian Hao
Keyword(s):  
Experimental Study ◽  
Atomic Emission ◽  
Spectrum Line ◽  
Static Calibration ◽  
Temperature Measuring ◽  
Line Temperature

Thermal Entry in Falling Liquid Films at High Reynolds Numbers

2011 ◽  
Vol 6 (4) ◽  
pp. 51-54
Author(s):  
Evgeny Chinnov ◽  
Sergey Abdurakipov
Keyword(s):  
Experimental Study ◽  
Reynolds Numbers ◽  
Liquid Films ◽  
Field Methods ◽  
Entry Length ◽  
Temperature Measuring ◽  
Strong Wave ◽  
High Reynolds Numbers ◽  
High Reynolds ◽  
Falling Liquid Films

An experimental study of thermal entry length in falling liquid films at high Reynolds numbers was performed with the use of field methods for thickness and temperature measuring. It was shown that the combination of the strong wave and thermocapillary effects leads to a significant decrease of thermal entry length

Development of Grinding Temperature Measuring System Considering Compensation of Thermocouple Dynamic Responding Error

2006 ◽  
Vol 304-305 ◽  
pp. 127-130 ◽  
Author(s):  
Hang Gao ◽  
Ren Ke Kang ◽  
Dong Ming Guo ◽  
Jian Li
Keyword(s):  
Experimental Study ◽  
Dynamic Response ◽  
Characteristic Curve ◽  
Measuring System ◽  
Grinding Temperature ◽  
Second Development ◽  
Temperature Measuring ◽  
Modification Method ◽  
Data Acquiring ◽  
Response Errors

In order to improve grinding temperature measuring precision the compensation method of thermocouple dynamic response errors and the modification method of non-linearity of thermocouple characteristic curve were analyzed and then programmed with VC++ language. Further more a grinding temperature measuring system was developed by means of second development of 10612CF type of TOP DAC (data acquiring card) with LabWindows/CVI, which provides three kinds of estimating thermocouple time constant methods. Primary debugging results showed that the measuring system developed is simply easy to handle and can satisfy experimental study of grinding temperature.

New Approach to Tire Durability Testing

1965 ◽  
Vol 38 (4) ◽  
pp. 741-756 ◽  
Author(s):  
D. M. Coddington ◽  
W. D. Marsh ◽  
H. C. Hodges
Keyword(s):  
Experimental Study ◽  
Ambient Temperature ◽  
Measuring Technique ◽  
New Approach ◽  
Broad Application ◽  
Tire Industry ◽  
Dynamic Temperature ◽  
Temperature Measuring ◽  
Durability Testing

Abstract A new fundamental approach to tire durability testing is described based on dynamic temperature build-up. This has been made possible by development of a practical technique for continuously measuring the internal shoulder temperature of tires during actual road operation at speeds up to 80 mph. Utility of this technique has been demonstrated in a systematic characterization of effects of load, inflation, speed, and ambient temperature on tire running temperature for tires made from two widely different elastomers, SBR and butyl. Within the scope of the experimental study, correlation of tire durability to running temperature has been developed. The dynamic temperature measuring technique and the apparent relations between running temperature and durability should have broad application in the tire industry.

scholarly journals G. Brodieand, G. Torgovnikov. EXPERIMENTAL STUDY OF MICROWAVE SLOW WAVE COMB AND CERAMIC APPLICATORS FOR SOIL TREATMENT AT FREQUENCY 2.45 GHZ

2019 ◽  
Author(s):  
Grigory Torgovnikov ◽  
Graham Brodie
Keyword(s):  
Experimental Study ◽  
Energy Distribution ◽  
Slow Wave ◽  
Soil Surface ◽  
Soil Treatment ◽  
Energy Losses ◽  
Surface Layers ◽  
Temperature Measuring ◽  
Surface Areas ◽  
Two Temperature

EXPERIMENTAL STUDY OF MICROWAVE SLOW WAVE COMB AND CERAMIC APPLICATORS FOR SOIL TREATMENT AT FREQUENCY 2.45 GHZ. G. Brodie and G. Torgovnikov University of Melbourne, 4 Water St, Creswick, Victoria 3363, Australia; e-mail: [email protected]   Keywords: ceramic applicator, comb applicator, microwave, slow wave, soil microwave treatment In many cases in industry it is required to heat or treat surface layers of different material (soil, timber, concrete, plastics and so on) with microwaves (MW). Traditional MW irradiators (antennas) cannot provide heating only in the surface areas and energy penetrates deep into the material, where it decays exponentially due to normal attenuation. Therefore, energy losses, if a heating depth of 20 - 40 mm (for example to heat soil for killing weed seeds) is all that is required, are very significant. Therefore, it is required to develop special MW applicators for surface treatment to increase process efficiency. To address this problem, a slow wave (which is sometimes called a "surface wave" applicator) comb and ceramic structures, was studied. The main property of slow waves is that the energy concentration is very near impedance electrode – comb or ceramic plate surface.  Previously, slow wave structures were used mostly as delay lines and as interaction circuits in MW vacuum devices, and their properties were explored only for these specific applications. The work objectives of this study were: design slow wave, ceramic and comb structure applicators for soil treatment at frequency 2.45 GHz;experimentally study the energy distribution from slow wave applicators in the soil;study of opportunities to use slow wave structures for surface soil layer heating; andrecommendations for practical use of new slow wave applicators. Comb and ceramic slab applicators for frequency 2.45 GHz operation were designed for the soil treatment on the bases of theoretical studies and computer modelling. The comb applicator was made from aluminium and the ceramic slab applicator was made from alumina (DC=9.8, loss tangent=0.0002). A 30 kW (2.45 GHz) microwave generator was used for experiments. Containers with soil were placed on the applicator surface. An auto tuner was used in MW system to provided good impedance matching of the generator and applicators (with soil on top). This resulted in practically no power reflection. The soil “Potting Mix Hortico”, with moisture content range 32-174% and density range 590-1070 kg/m3, was used for the experiments. Energy distribution in the soil was determined by temperature measuring in the soil using thermocouples, after MW heating. Distribution of temperature measuring points covered the whole volume of the soil along and across the applicator. Results of the experiments showed that the comb applicator provides maximum energy release in soil in the central vertical plane. The ceramic alumina applicator forms two temperature maximums in two vertical planes at a distance of about 40 mm from the central applicator plane and a minimum in the applicator central plane.  The ceramic applicator provides better uniformity of energy distribution across the width of the applicator due to the two temperature maximums. It reduces overheating of the soil surface and energy losses. The depth of energy penetration provided by ceramic applicator is lower compared with the comb applicator. It means that the ceramic applicator provides better energy localization and more energy absorption in the soil surface layers compared with the comb applicator. To provide better uniformity of energy distribution across the ceramic applicator it is recommended to use ceramics with higher dielectric constants, such as in the range of 15-25, which will allow more energy to be released closer to the applicator surface. It will increase efficiency of MW energy use. The ceramic applicator is more effective for MW treatment of the soil surface areas and is recommended for practical use in machines for thermal treatment and sterilization of surface layers of the soil and other materials.    

Experimental study on the restoration from a tilt-azimuth series for improvement in resolution

1995 ◽  
Vol 53 ◽  
pp. 636-637
Author(s):  
Norio Baba ◽  
Norihiko Ichise ◽  
Syunya Watanabe
Keyword(s):  
Experimental Study ◽  
Spherical Aberration ◽  
Incident Beam ◽  
Optical Parameters ◽  
Beam Tilting ◽  
Illumination Method ◽  
Restoration Method ◽  
Illumination Mode

The tilted beam illumination method is used to improve the resolution comparing with the axial illumination mode. Using this advantage, a restoration method of several tilted beam images covering the full azimuthal range was proposed by Saxton, and experimentally examined. To make this technique more reliable it seems that some practical problems still remain. In this report the restoration was attempted and the problems were considered. In our study, four problems were pointed out for the experiment of the restoration. (1) Accurate beam tilt adjustment to fit the incident beam to the coma-free axis for the symmetrical beam tilting over the full azimuthal range. (2) Accurate measurements of the optical parameters which are necessary to design the restoration filter. Even if the spherical aberration coefficient Cs is known with accuracy and the axial astigmatism is sufficiently compensated, at least the defocus value must be measured. (3) Accurate alignment of the tilt-azimuth series images.

An Experimental Study of Some Properties of Stuttered Words

1962 ◽  
Vol 5 (4) ◽  
pp. 387-394 ◽  
Author(s):  
Bruce Quarrington ◽  
Jerome Conway ◽  
Nathan Siegel
Keyword(s):  
Experimental Study
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