RU99119654A - METHOD FOR NON-DESTRUCTIVE CONTROL OF THERMOPHYSICAL CHARACTERISTICS OF MATERIALS - Google Patents

METHOD FOR NON-DESTRUCTIVE CONTROL OF THERMOPHYSICAL CHARACTERISTICS OF MATERIALS

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Publication number
RU99119654A
RU99119654A RU99119654/28A RU99119654A RU99119654A RU 99119654 A RU99119654 A RU 99119654A RU 99119654/28 A RU99119654/28 A RU 99119654/28A RU 99119654 A RU99119654 A RU 99119654A RU 99119654 A RU99119654 A RU 99119654A
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RU
Russia
Prior art keywords
temperature
heat source
materials
thermophysical characteristics
over time
Prior art date
Application number
RU99119654/28A
Other languages
Russian (ru)
Other versions
RU2179717C2 (en
Inventor
Игорь Николаевич Ищук
Александр Иванович Фесенко
Original Assignee
Тамбовский военный авиационный инженерный институт
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Publication date
Application filed by Тамбовский военный авиационный инженерный институт filed Critical Тамбовский военный авиационный инженерный институт
Priority to RU99119654A priority Critical patent/RU2179717C2/en
Priority claimed from RU99119654A external-priority patent/RU2179717C2/en
Publication of RU99119654A publication Critical patent/RU99119654A/en
Application granted granted Critical
Publication of RU2179717C2 publication Critical patent/RU2179717C2/en

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Claims (1)

Способ неразрушающего контроля теплофизических характеристик материалов, заключающийся в использовании импульсного нагрева поверхности теплоизолированного исследуемого материала и измерении интегральных во времени значений температур, отличающийся тем, что применяют точечный источник тепла и два датчика температуры, расположенных на расстоянии r1 и r2 от источника тепла, при измерении времени выполнения наперед заданного соотношения интегральных во времени значений температур искомые теплофизические характеристики материалов рассчитывают по формулам:
Figure 00000001

Figure 00000002

где а - коэффициент температуропроводности;
τ - момент наступления наперед заданного соотношения интегральных во времени температур, равного
Figure 00000003

r1 - расстояние между источником тепла и соответствующим термодатчиком (причем r2=2r1);
λ - коэффициент теплопроводности;
Q - количество тепла, выделяемого точечным источником тепла;
I1 - интегральное во времени значение температуры;
Ф(х) - интеграл вероятности для
Figure 00000004

n - целое наперед заданное число.A method of non-destructive testing of the thermophysical characteristics of materials, which consists in using pulsed heating of the surface of a thermally insulated test material and measuring temperature integral values over time, characterized in that a point heat source and two temperature sensors are used located at a distance of r 1 and r 2 from the heat source, at measuring the runtime of a predetermined ratio of temperature integrals over time, the desired thermophysical characteristics of materials p sschityvayut by the formulas:
Figure 00000001

Figure 00000002

where a is the coefficient of thermal diffusivity;
τ is the moment when the predetermined ratio of the temperature integrals in time is equal to
Figure 00000003

r 1 is the distance between the heat source and the corresponding temperature sensor (with r 2 = 2r 1 );
λ is the coefficient of thermal conductivity;
Q is the amount of heat generated by a point heat source;
I 1 is the temperature integral over time;
F (x) is the probability integral for
Figure 00000004

n is a predetermined integer.
RU99119654A 1999-09-13 1999-09-13 Process of non-destructive test of thermal-physical characteristics of materials RU2179717C2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
RU99119654A RU2179717C2 (en) 1999-09-13 1999-09-13 Process of non-destructive test of thermal-physical characteristics of materials

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
RU99119654A RU2179717C2 (en) 1999-09-13 1999-09-13 Process of non-destructive test of thermal-physical characteristics of materials

Publications (2)

Publication Number Publication Date
RU99119654A true RU99119654A (en) 2001-07-27
RU2179717C2 RU2179717C2 (en) 2002-02-20

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Country Status (1)

Country Link
RU (1) RU2179717C2 (en)

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