Survey of Heat Transfer to Near-Critical Fluids

Hendricks, R. C.; Simoneau, R. J.; Smith, R. V.

doi:10.1007/978-1-4757-0513-3_27

Cited by 14 publications

(15 citation statements)

References 50 publications

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“…Data in region 1 were correlated based on the expression of Nu cRe a Pr b / f = / w d , which has been used in many previous studies [8,[13][14][15][16][17]. In this expression, the power in the Reynolds number represents the effect of the flowfield on heat convection, whereas the power in the Prandtl number denotes the effect of fuel properties.…”

Section: Heat Transfer Correlationsmentioning

confidence: 99%

“…It is known [6,7] that supercritical fuel exhibits a liquidlike density and a gaslike diffusivity. In addition, the variations of many of the fuel thermodynamic and transport properties, such as density, specific heats, viscosity, and thermal conductivity, with temperature are complex, depending on the thermophysical conditions [8,9]. Taking China no.…”

Section: Introductionmentioning

confidence: 99%

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Heat Transfer of Aviation Kerosene at Supercritical Conditions

Zhong

Fan

Gong

et al. 2009

Journal of Thermophysics and Heat Transfer

183

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The heat transfer characteristics of China no. 3 kerosene were investigated experimentally and analytically under conditions relevant to a regenerative cooling system for scramjet applications. A test facility developed for the present study can handle kerosene in a temperature range of 300-1000 K, a pressure range of 2.6-5 MPa, and a mass flow rate range of 10-100 g=s. In addition, the test section was uniquely designed such that both the wall temperature and the bulk fuel temperature were measured at the same location along the flowpath. The measured temperature distributions were then used to analytically deduce the local heat transfer characteristics. A 10-component kerosene surrogate was proposed and employed to calculate the fuel thermodynamic and transport properties that were required in the heat transfer analysis. Results revealed drastic changes in the fuel flow properties and heat transfer characteristics when kerosene approached its critical state. Convective heat transfer enhancement was also found as kerosene became supercritical. The heat transfer correlation in the relatively low-fuel-temperature region yielded a similar result to other commonly used jet fuels, such as JP-7 and JP-8, at compressed liquid states. In the high-fuel-temperature region, near and beyond the critical temperature, heat transfer enhancement was observed; hence, the associated correlation showed a more significant Reynolds number dependency.

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Section: Heat Transfer Correlationsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Heat Transfer of Aviation Kerosene at Supercritical Conditions

Zhong

Fan

Gong

et al. 2009

Journal of Thermophysics and Heat Transfer

183

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“…It has been known that the working pressure of fuel is usually higher than its critical value (P c ) and along the cooling path, fuel temperature would increase and exceed its critical temperature (T c ) so that hydrocarbon fuel becomes supercritical without going through a two-phase dome region. Compared to gaseous or liquid state, supercritical fluid presents many of unique features [3][4][5]. It has gas-like transport property, relatively large density similar to liquid and very high solubility.…”

Section: Introductionmentioning

confidence: 99%

Numerical study of heat transfer deterioration of turbulent supercritical kerosene flow in heated circular tube

Dang

Zhong

Zhang

et al. 2015

International Journal of Heat and Mass Transfer

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a b s t r a c tTurbulent flow and convective heat transfer of supercritical kerosene flow in an axisymmetrically heated circular tube with a diameter of 2 mm and at a mass flow rate range of 0.0015-0.015 kg/s and a wall heat flux range of 0.15-2.0 MW/m 2 are numerically studied using Reynolds averaged Navier-Stokes method with a two-layer turbulence model. The thermophysical and transport properties of kerosene are determined by a 10-species surrogate with the Extended Corresponding State method. Mesh dependency is first investigated and numerical results of fuel and wall temperatures are compared with experimental data for validations. The results show that flow properties such as velocity and Reynolds number increase significantly along the axial direction as the fuel temperature rises and kerosene undergoes the state transition from liquid to supercritical state. Deterioration of convective heat transfer is found to occur when the wall heat flux exceeds a critical value and at the same time, the wall temperature approaches the pseudo-critical temperature of kerosene. The present results show that deterioration of heat transfer are attributed to the development of turbulent properties in the near-wall region based on the results of turbulent kinetic energy and turbulence production term. The relation between the critical heat flux (q wc ) for occurrence of heat transfer deterioration and the mass flux (G) is studied and a fitting formula of q wc and G is obtained.

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“…The ordinary Dittus-Boelter equation (Equation 4.16) cannot be used to correlate near-critical forced convection phenomena. Correlations for free convection are not consistent with pool boiling data, standard boiling equations exhibit discontinuities, and oscillations are commonplace [1] (see Section 4.3).…”

Section: Convective Heat Transfer In Tubes Laminar Flowmentioning

confidence: 82%

“…The discussion of heat transfer is divided into four parts: gas and part of the compressible liquid (Region I), liquid (Region II), the two-phase region (Region III), and the near-critical region (Region IV) [1]. The regions are illustrated in Figure 4.1.…”

Section: Overview On Heat Transfer Regionsmentioning

confidence: 99%

Heat Transfer

Brunner¹

2014

Hydrothermal and Supercritical Water Processes

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Survey of Heat Transfer to Near-Critical Fluids

Cited by 14 publications

References 50 publications

Heat Transfer of Aviation Kerosene at Supercritical Conditions

Heat Transfer of Aviation Kerosene at Supercritical Conditions

Numerical study of heat transfer deterioration of turbulent supercritical kerosene flow in heated circular tube

Heat Transfer

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