RU2009126096A - METHOD OF THERMAL CONTROL OF RESISTANCE OF HEAT TRANSFER OF MULTILAYERED DESIGN IN UNSTEADY STATUS CONDITIONS OF HEAT TRANSFER - Google Patents
METHOD OF THERMAL CONTROL OF RESISTANCE OF HEAT TRANSFER OF MULTILAYERED DESIGN IN UNSTEADY STATUS CONDITIONS OF HEAT TRANSFER Download PDFInfo
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- RU2009126096A RU2009126096A RU2009126096/28A RU2009126096A RU2009126096A RU 2009126096 A RU2009126096 A RU 2009126096A RU 2009126096/28 A RU2009126096/28 A RU 2009126096/28A RU 2009126096 A RU2009126096 A RU 2009126096A RU 2009126096 A RU2009126096 A RU 2009126096A
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Abstract
1. Способ теплового контроля сопротивления теплопередачи многослойной конструкции в нестационарных условиях теплопередачи, включающий тепловизионное обследование одной из поверхностей исследуемого объекта, сравнение теоретических и полученных измерением результатов и выбор для дальнейших расчетов значения теплопроводности из числа заданных, которое обеспечивает условия сравнения, ! отличающийся тем, что перед тепловизионным обследованием конструкции определяют время тепловой инерции (Δτин) и дискретность разрешения тепловизора, исходя из минимального дефекта, тепловизионное обследование проводят путем измерения температурного поля T(x,y) поверхности с пространственным периодом Δa, определяемым размерами минимального дефекта конструкции: ! ! где Δxдmin, Δyдmin - геометрические размеры минимального дефекта контролируемой конструкции, ! измеряют значения температуры Tн(ti), Tв(ti) на противоположных сторонах конструкции в области с координатами контура L(x,y) вблизи точки с координатами x0, y0, с временными интервалами τтн и τтв, соответственно, в течение интервалов времени: ! на наружной поверхности Δτиз нар=(0…τиз), на внутренней поверхности Δτиз вн=(Δτин…(Δτин+τиз)); ! измеряют значения теплового потока на внутренней стороне конструкции qв(tj) с временным интервалом τq последовательно во времени в течение интервала времени (Δτиз вн=(Δτин…(Δτин+τиз)); ! накапливают по каждому измерению значения температуры Tн(ti), Tв(ti) на противоположных сторонах конструкции и значения теплового потока qв(tj), ! определяют сопротивление теплопередаче R многослойной конструкции в точке контролируемого участка поверхности исследу� 1. A method of thermal control of heat transfer resistance of a multilayer structure under non-stationary conditions of heat transfer, including thermal imaging inspection of one of the surfaces of the object under study, comparison of theoretical and obtained by measuring results and selection of thermal conductivity from among the given values for further calculations, which provides comparison conditions,! characterized in that before the thermal imaging inspection of the structure, the thermal inertia time (Δτin) and the resolution resolution of the thermal imager are determined based on the minimum defect, the thermal imaging inspection is carried out by measuring the temperature field T (x, y) of the surface with a spatial period Δa determined by the dimensions of the minimum structural defect: ! ! where Δxдmin, Δyдmin are the geometric dimensions of the minimum defect of the controlled structure,! measure the temperature Tн (ti), Тв (ti) on opposite sides of the structure in the area with the coordinates of the contour L (x, y) near the point with coordinates x0, y0, with time intervals τtn and τtv, respectively, during time intervals:! on the outer surface Δτiz nar = (0 ... τiz), on the inner surface Δτiz np = (Δτin ... (Δτin + τiz)); ! measure the heat flux on the inner side of the structure qв (tj) with a time interval τq sequentially in time during the time interval (Δτin int = (Δτin ... (Δτin + τiz));! accumulate temperature values Тн (ti), Тв for each measurement (ti) on opposite sides of the structure and the heat flux qв (tj),! determine the heat transfer resistance R of the multilayer structure at the point of the controlled surface
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RU2009126096/28A RU2420730C2 (en) | 2009-07-09 | 2009-07-09 | Method for thermal control of heat-transfer resistance of multilayer structure in unsteady heat-transfer conditions |
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RU2009126096/28A RU2420730C2 (en) | 2009-07-09 | 2009-07-09 | Method for thermal control of heat-transfer resistance of multilayer structure in unsteady heat-transfer conditions |
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Cited By (3)
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CN113533423A (en) * | 2021-07-21 | 2021-10-22 | 中国建筑第八工程局有限公司 | Engineering field detection method and system for wall heat transfer coefficient under non-constant temperature condition |
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