Finite element analysis of conductive and radiative heating of a thin skin calorimeter

Mehta, R. C.; Jayachandran, T.; Sastri, V. M. K.

doi:10.1007/bf01377245

Cited by 4 publications

(3 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The accurate static and transient loading heat flux are acquired by heat flux sensor (HFS), which is installed with high temperature components in the power system, and the parameter is of great significance for guiding the design and health monitoring of high temperature components (Wrbanek and Fralick, 2007a; Frankel, 2012). According to the boundary conditions of the differential equation of heat conduction, there are three measuring methods in HFS: The devices based on the conservation of energy with complex package structure, which influence the flow field distribution, the typical examples include the thin skin calorimeter, slug calorimeter and water calorimeter (Mehta et al , 1988). The devices based on the semi-infinite general assumption, which cannot be used in steady-state test, such as coaxial thermocouples and thin-film resistance elements (Manjhi and Kumar, 2019).…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Development of thin film heat flux sensor based on transparent conductive oxide thermopile with antireflective coating

Cui

Sun

et al. 2022

View full text Add to dashboard Cite

Purpose The measurement of heat flux is of importance to the development of aerospace engine as basic physical quantities in extreme environment. Heat radiation is one of the basic forms of heat transfer phenomenon. The structure optimizing can improve the performance and infrared absorptivity of the thin film sensor. Design/methodology/approach This paper designed one kind of thin film heat flux sensor (HFS) with antireflective coating based on transparent conductive oxide thermopile. The introduced membrane structure is so thin that it has little impact on sensor performance. Fabrication of thin film sensors were fabricated by physical vapor deposition (PVD) process. Findings The steady-state and dynamic response characteristics of the HFS were investigated by calibration platform. The experimental results shown that the absorptivity of the membrane structure (for1070nm) improved compared with that before optimization. The sensitivity of heat flux gauge was 48.56 µV/ (kW/m2) and its frequency response was determined to be about 1980 Hz. Originality/value The thin film HFS uses thermopile based on Indium Tin Oxid and In2O3. The antireflective coating is introduced to hot endpoint of HFS to improve sensitivity on laser thermal source. The infrared optical properties of membrane layer structure were investigated. The steady-state and the transient response characteristics of the heat flux sensor were also investigated.

show abstract

Section: Introductionmentioning

confidence: 99%

“…The devices based on the conservation of energy with complex package structure, which influence the flow field distribution, the typical examples include the thin skin calorimeter, slug calorimeter and water calorimeter (Mehta et al , 1988).…”

Section: Introductionmentioning

confidence: 99%

Development of thin film heat flux sensor based on transparent conductive oxide thermopile with antireflective coating

Cui

Sun

et al. 2022

View full text Add to dashboard Cite

show abstract

“…Inverse heat conduction analysis provides an efficient tool for estimating the thermophysical properties of materials, the boundary conditions, or the initial conditions. Estimation of surface heat flux has been carried out without [15] and with [16] heat conduction and comparison between them shows discrepancies as high as about 27% [17]. Moving window optimization method [18] has been applied to predict the aerodynamic heating in a free-flight of sounding rocket by comparing numerically calculated and measured temperature history.…”

Section: Introductionmentioning

confidence: 99%

Influence of Input Parameters on the Solution of Inverse Heat Conduction Problem

Mehta¹

2020

Inverse Heat Conduction and Heat Exchangers

View full text Add to dashboard Cite

A one-dimensional transient heat conduction equation is solved using analytical and numerical methods. An iterative technique is employed which estimates unknown boundary conditions from the measured temperature time history. The focus of the present chapter is to investigate effects of input parameters such as time delay, thermocouple cavity, error in the location of thermocouple position and time-and temperature-dependent thermophysical properties. Inverse heat conduction problem IHCP is solved with and without material conduction. A two-time level implicit finite difference numerical method is used to solve nonlinear heat conduction problem. Effects of uniform, nonuniform and deforming computational grids on the estimated convective heat transfer are investigated in a nozzle of solid rocket motor. A unified heat transfer analysis is presented to obtain wall heat flux and convective heat transfer coefficient in a rocket nozzle. A two-node exact solution technique is applied to estimate aerodynamic heating in a free flight of a sounding rocket. The stability of the solution of the inverse heat conduction problem is sensitive to the spatial and temporal discretization.

show abstract

Theory of transient experimental techniques for surface heat transfer

Taler

1996

International Journal of Heat and Mass Transfer

View full text Add to dashboard Cite

Finite element analysis of conductive and radiative heating of a thin skin calorimeter

Cited by 4 publications

References 1 publication

Development of thin film heat flux sensor based on transparent conductive oxide thermopile with antireflective coating

Development of thin film heat flux sensor based on transparent conductive oxide thermopile with antireflective coating

Influence of Input Parameters on the Solution of Inverse Heat Conduction Problem

Theory of transient experimental techniques for surface heat transfer

Contact Info

Product

Resources

About