Experimental and CFD analysis of multi nozzle ejector system for aircraft compact heat exchanger applications

2021 ◽  
pp. 1-15
Author(s):  
L. Sheik Ismail ◽  
N. Govindha Rasu ◽  
V. Krishnaprasad ◽  
Ch Ranganayakulu
Keyword(s):  
Heat Exchanger ◽  
Compact Heat Exchanger ◽  
Cfd Analysis ◽  
Ejector System

Colburn ‘j’ Factor and Fanning Friction Factor ‘f’ Correlations of Triangular Plain Fin Surface of a Compact Heat Exchanger Using CFD

2015 ◽  
Vol 787 ◽  
pp. 207-211 ◽  
Author(s):  
Ramisetty Bala Sundar Rao ◽  
G. Ranganath ◽  
C. Ranganayakulu
Keyword(s):  
Heat Exchanger ◽  
Friction Factor ◽  
Cost Effective ◽  
Reynolds Numbers ◽  
Compact Heat Exchanger ◽  
Cfd Analysis ◽  
Colburn Factor ◽  
I Factor ◽  
Geometric Variables ◽  
Fanning Friction Factor

This paper presents the heat transfer and friction coefficient correlations for triangular plain fin surfaces of plate fin compact heat exchanger. It will be prohibitively expensive and time consuming to fabricate heat exchanger cores and conduct experiments over reasonable ranges of all the geometric variables. In contrast, it is relatively easy and cost effective to carry out a parametric study through numerical simulation and derive acceptable correlations for use in industry. A numerical model has been developed for the triangular plain fin of plate fin heat exchanger. The CFD analysis is carried out using FLUENT 12.1, Colburn factor j and fanning friction factor f are calculated for different Reynolds numbers. These values are compared with the available literature data of j and f factors. The correlations have been expressed in terms of two separate equations over the low and high Re regions along with dimensionless geometric parameters.

scholarly journals Fanning friction (f) and colburn (j) factors of a louvered fin and flat tube compact heat exchanger

2017 ◽  
Vol 21 (1 Part A) ◽  
pp. 141-150 ◽  
Author(s):  
Pooranachandran Karthik ◽  
Vellaisamy Kumaresan ◽  
Ramalingam Velraj
Keyword(s):  
Heat Exchanger ◽  
Large Deviation ◽  
Compact Heat Exchanger ◽  
Cfd Analysis ◽  
Compact Heat Exchangers ◽  
Louvered Fin ◽  
Goodness Factor ◽  
Predicted Values ◽  
Louvered Fins ◽  
Good Agreement

In the present study, the heat transfer and pressure drop characteristics of air over the louvered fins in a compact heat exchanger, used as a radiator in the automobiles have been experimentally investigated. The experiments were conducted at various flow rates of air and the results showed a decrease in goodness factor of 22.7% with respect to increase in Reynolds number from 231 to 495. The experimental results were compared with the CFD results and the ?f? and ?j? factors from the CFD analysis are in good agreement with the experimental data. Also, the experimental ?f? and ?j? factors were compared with the predicted values from the available correlations in the literature for the louvered fin and tube compact heat exchangers. The large deviation of the predicted results revealed that the correlations are not reliable for the design of the compact heat exchanger. Hence, the CFD analysis is more advantageous for the optimal design of compact heat exchanger, which also reduces the experimentation time and cost.

scholarly journals Numerical analysis and performance enhancement of compact heat exchanger using computational fluid dynamics

2021 ◽  
Author(s):  
Agarwal A. ◽  
◽  
Molwane O.B ◽  
Pitso I ◽  
◽  
...  
Keyword(s):  
Heat Transfer ◽  
Fluid Dynamics ◽  
Computational Fluid Dynamics ◽  
Heat Exchanger ◽  
Heat Exchangers ◽  
Compact Heat Exchanger ◽  
Cfd Analysis ◽  
Heat Transfer Characteristics ◽  
Good Efficiency ◽  
Transfer Characteristics

Compact heat exchangers are used in various industries due to its good efficiency and compactness. The fluid used in heat exchanger has significant effect in augmentation of heat transfer characteristics of heat exchangers. In recent years, researchers have shown keen interest in uses of nanofluids for heat exchangers due to its good thermo-physical properties. The present study explores the application of ZnO /water nanofluid on compact heat exchanger with circular tubes using techniques of Computational Fluid Dynamics (CFD). The CAD model is developed in Creo design software and CFD analysis is conducted using ANSYS CFX. The volume concentration of nanoparticles used for analysis are .02,.04 and .07. The CFD analysis is conducted for both laminar and turbulent flow regime using SSG shear stress turbulence model. The temperature distribution, Nusselt number and pressure plots are generated to determine heat transfer characteristics. The results are encouraging, and significant enhancement of heat transfer is achieved using ZnO/water nanofluid. However, the pumping power requirement also increased with increase in nanoparticle concentration.

Performance Analysis on Compact Heat Exchanger

2017 ◽  
Vol 4 (8) ◽  
pp. 8447-8453 ◽  
Author(s):  
P.B. Thakre ◽  
P.R. Pachghare
Keyword(s):  
Heat Exchanger ◽  
Performance Analysis ◽  
Compact Heat Exchanger

The Single-Blow Transient Testing Technique for Compact Heat Exchanger Surfaces

1967 ◽  
Vol 89 (1) ◽  
pp. 29-38 ◽  
Author(s):  
P. F. Pucci ◽  
C. P. Howard ◽  
C. H. Piersall
Keyword(s):  
Heat Transfer ◽  
Heat Exchanger ◽  
Heat Transfer Performance ◽  
Compact Heat Exchanger ◽  
Experimental Facility ◽  
Nickel Plate ◽  
Heat Transfer Characteristics ◽  
Power Penalty ◽  
Testing Technique ◽  
Flow Friction

The single-blow, transient testing technique for determining the heat transfer characteristics of heat exchanger surfaces, with a summary of the underlying theory, a description of an experimental facility, and comments on the applicability of the technique, are presented. Heat transfer and flow friction data are presented for plate-fin type surfaces fabricated of perforated nickel plate. The data indicate that perforations increase heat transfer performance without a large frictional power penalty.

Sign in / Sign up

Export Citation Format

Share Document