2011 Lynch JT
... detrimental effects of vortical flows that are present near the junction of the airfoil and its endwall. These flows, generally termed secondary flows, increase aerodynamic losses through the turbine leading to lower overall engine efficiency. Furthermore, the vortical flows result in high heat tran ...
... detrimental effects of vortical flows that are present near the junction of the airfoil and its endwall. These flows, generally termed secondary flows, increase aerodynamic losses through the turbine leading to lower overall engine efficiency. Furthermore, the vortical flows result in high heat tran ...
Chapter 19 - Clg Coils
... With the mass and heat transfer coefficients related as given by equation 2.6, the energy flow can be expressed in terms of the difference between mean enthalpy of air and the enthalpy of saturated air at the condensate surface temperature (Section 5.7). It is convenient to introduce an overall surf ...
... With the mass and heat transfer coefficients related as given by equation 2.6, the energy flow can be expressed in terms of the difference between mean enthalpy of air and the enthalpy of saturated air at the condensate surface temperature (Section 5.7). It is convenient to introduce an overall surf ...
Mixed convection of power-law fluids along a vertical wedge with
... rates for the selected values of the wedge and convective parameters are presented in Table 2. For the mixed convection regime, Eqs. (7) and (8) with boundary conditions (9) are solved by using an implicit finite difference method as described by Gorla and Kumari [9]. Numerical results of local skin ...
... rates for the selected values of the wedge and convective parameters are presented in Table 2. For the mixed convection regime, Eqs. (7) and (8) with boundary conditions (9) are solved by using an implicit finite difference method as described by Gorla and Kumari [9]. Numerical results of local skin ...
Introduction to mantle convection 1 The fluid mantle
... that we don’t need to know ∆T , u, or r! Using standard values we obtain Q = 0.2 TW. This is only about 0.5% of the global heat flow. The total heat flow of all mantle plumes is only about 2.3 TW, which is about 6% of the global total heat flow. The plate mode of convection accounts for 90% of the h ...
... that we don’t need to know ∆T , u, or r! Using standard values we obtain Q = 0.2 TW. This is only about 0.5% of the global heat flow. The total heat flow of all mantle plumes is only about 2.3 TW, which is about 6% of the global total heat flow. The plate mode of convection accounts for 90% of the h ...
Specific heat and thermal conductivity of softwood bark and - EBI-vbt
... measurement and (iii) sample measurement. In the baseline measurement, empty crucibles were placed in both the sample and the reference holders. For a reference measurement, an empty crucible was put on the reference side holder, while another crucible with a reference material (i.e. sapphire) in th ...
... measurement and (iii) sample measurement. In the baseline measurement, empty crucibles were placed in both the sample and the reference holders. For a reference measurement, an empty crucible was put on the reference side holder, while another crucible with a reference material (i.e. sapphire) in th ...
Analysis of combined natural convection and thermal radiation heat
... circulation is not stable with respect to the Bernard instability one expects in fluid layers heated from below. Recently, Holtzman et al. [10] revealed that the natural convection flow in an isosceles triangular domain undergoes a transition from symmetric to asymmetric structures. For low Grashof ...
... circulation is not stable with respect to the Bernard instability one expects in fluid layers heated from below. Recently, Holtzman et al. [10] revealed that the natural convection flow in an isosceles triangular domain undergoes a transition from symmetric to asymmetric structures. For low Grashof ...
lec13-problems-solutions
... • It is given that the heat transfer from the system is Q = -37.6 kJ • Therefore, -37.6 = ΔU – 15.75 or, ΔU = -21.85 kJ • The change in internal energy of the gas is -21.85 kJ (decrease in internal energy during the process) ...
... • It is given that the heat transfer from the system is Q = -37.6 kJ • Therefore, -37.6 = ΔU – 15.75 or, ΔU = -21.85 kJ • The change in internal energy of the gas is -21.85 kJ (decrease in internal energy during the process) ...
Z. Wang , V. Leonov , P. Fiorini
... surface micromachining technology, as shown in Fig. 10. The Si substrate is firstly patterned and etched to form the trenches (Fig. 10(a)). Then the trenches, which are 2.5 μm deep, are filled with the first layer of sacrificial TEOS and the wafer is planarized by chemical mechanical polishing (CMP) ...
... surface micromachining technology, as shown in Fig. 10. The Si substrate is firstly patterned and etched to form the trenches (Fig. 10(a)). Then the trenches, which are 2.5 μm deep, are filled with the first layer of sacrificial TEOS and the wafer is planarized by chemical mechanical polishing (CMP) ...
Dynamic insulation
Dynamic insulation is a form of insulation where cool outside air flowing through the thermal insulation in the envelope of a building will pick up heat from the insulation fibres. Buildings can be designed to exploit this to reduce the transmission heat loss (U-value) and to provide pre-warmed, draft free air to interior spaces. This is known as dynamic insulation since the U-value is no longer constant for a given wall or roof construction but varies with the speed of the air flowing through the insulation (climate adaptive building shell). Dynamic insulation is different from breathing walls. The positive aspects of dynamic insulation need to be weighed against the more conventional approach to building design which is to create an airtight envelope and provide appropriate ventilation using either natural ventilation or mechanical ventilation with heat recovery. The air-tight approach to building envelope design, unlike dynamic insulation, results in a building envelope that provides a consistent performance in terms of heat loss and risk of interstitial condensation that is independent of wind speed and direction. Under certain wind conditions a dynamically insulated building can have a higher heat transmission loss than an air-tight building with the same thickness of insulation.