SU85004A1 - Device for determining thermal and thermal diffusivity - Google Patents
Device for determining thermal and thermal diffusivityInfo
- Publication number
- SU85004A1 SU85004A1 SU394930A SU394930A SU85004A1 SU 85004 A1 SU85004 A1 SU 85004A1 SU 394930 A SU394930 A SU 394930A SU 394930 A SU394930 A SU 394930A SU 85004 A1 SU85004 A1 SU 85004A1
- Authority
- SU
- USSR - Soviet Union
- Prior art keywords
- thermal
- determining
- diffusivity
- thermal diffusivity
- medium
- Prior art date
Links
Landscapes
- Investigating Or Analyzing Materials Using Thermal Means (AREA)
Description
Известны приборы, предназначенные дл определени коэффнциенIOB теплопроводности и температуропроводности теплоизолирующих материалов , а также грунтов в услови х эксплуатации или естественного залегапи .Instruments are known that are designed to determine the coefficient of thermal conductivity and thermal diffusivity of heat-insulating materials, as well as soils under conditions of use or natural bedding.
Обычно указанные коэффициенты определ ют путем измерени теплового потока через образец из испытуемого материала, при этом струк . тура и влажность материала при изготовлении из него образца нарушаютс .Typically, these coefficients are determined by measuring the heat flux through a sample of the test material, with the structure. The tour and the moisture content of the material is violated when the sample is made from it.
Предлагаемый прибор отличаетс тем, что он выполнен в виде полого медного шара, закладываемого в толще исследуемого материала ii спабженного электрическим нагревателем посто нной мощности и термопарой дл измерени температуры внутренней новерхности.The proposed device is characterized by the fact that it is made in the form of a hollow copper ball, laid in the thickness of the material under study ii prepared with an electric heater of constant power and a thermocouple to measure the temperature of the inner surface.
Действие прибора основано на создании в исследуемой среде внешнего температурного нол .The device is based on the creation of an external temperature zero in the test medium.
На схематическом .чертеже показан общий вид прибора.The schematic drawing shows the general view of the device.
Выполненный из меди корпус / нрнбора имеет выводную трубку 2, предназначеиную дл вывода нроводов, корпус заключен в медную, выполненную в .виде полого шара, оболочку 3. Между корпусом и оболочкой размеи1ен электрический нагреватель 4. В корпусе установлена термопара 5.The housing / housing made of copper has a lead-out tube 2, intended for outputting the wires, the case is enclosed in a copper shell 3, made in the form of a hollow ball. An electric heater 4 is placed between the case and the shell.
Прибор помещаетс в среду из испытываемого материала. После включени источника тока нроизвод тс измерени температуры в различпые моменты времени. Определение коэффициентов (Л - теплопроводности среды и /С - температуропроводности) производитс по формуле;The instrument is placed in the medium of the test material. After switching on the current source, temperature measurements are made at different points in time. Determination of the coefficients (L - thermal conductivity of the medium and / C - thermal diffusivity) is made according to the formula;
Т.-. l-l 1,ф1T.- l-l 1, f1
4). R : - Rfour). R: - R
где: R - радиус прибора,where: R is the radius of the device,
Т - пресыщение температуры поверхности над начальной температурой среды по истечении времени после начала опыта,T is the saturation of the surface temperature above the initial temperature of the medium after the time after the start of the experiment,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU394930A SU85004A1 (en) | 1949-04-07 | 1949-04-07 | Device for determining thermal and thermal diffusivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| SU394930A SU85004A1 (en) | 1949-04-07 | 1949-04-07 | Device for determining thermal and thermal diffusivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| SU85004A1 true SU85004A1 (en) | 1949-11-30 |
Family
ID=48257514
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| SU394930A SU85004A1 (en) | 1949-04-07 | 1949-04-07 | Device for determining thermal and thermal diffusivity |
Country Status (1)
| Country | Link |
|---|---|
| SU (1) | SU85004A1 (en) |
-
1949
- 1949-04-07 SU SU394930A patent/SU85004A1/en active
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