Instabilities of Compressible Flows with Internal Heat Addition

1996 ◽  
pp. 293-325
Author(s):  
G. H. Schnerr
Keyword(s):  
Compressible Flows ◽  
Internal Heat ◽  
Heat Addition

Simulating heat addition via mass addition in constant area compressible flows

AIAA Journal ◽  
1995 ◽  
Vol 33 (1) ◽  
pp. 167-171 ◽  
Author(s):  
W. H. Heiser ◽  
W. B. McClure ◽  
C. W. Wood
Keyword(s):  
Compressible Flows ◽  
Heat Addition ◽  
Constant Area

Stress Waves Generated by Heat Addition in an Elastic Solid

1965 ◽  
Vol 32 (1) ◽  
pp. 143-150 ◽  
Author(s):  
T. A. Zaker
Keyword(s):  
Thermal Diffusion ◽  
Stress Wave ◽  
Internal Heat ◽  
Elastic Solid ◽  
Step Function ◽  
Stress Wave Propagation ◽  
Power Deposition ◽  
Heat Addition ◽  
Finite Slab ◽  
Thermoelastic Solid

The problem of stress-wave generation in a linear thermoelastic solid by internal heat addition is investigated on the basis of a one-dimensional model of material response. A method of integration of the governing equations is given for the case of power deposition with arbitrary time and space variation. Closed-form results are presented for the half-space and the finite slab for power deposition which is a step function in time and exponential with distance from one surface, assuming negligible heat conduction. The influence of thermal diffusion on the stress field is estimated in terms of a dimensionless parameter representing the ratio of characteristic times of stress-wave propagation and thermal diffusion.

Second Law Analysis of Thermodynamic Cycles for Aero Engines

2015 ◽  
Author(s):  
Eva Kerber ◽  
Bernhard Weigand ◽  
Florian Schmidt ◽  
Stephan Staudacher
Keyword(s):  
Heat Transfer ◽  
Entropy Production ◽  
Internal Heat ◽  
Constant Volume ◽  
Specific Power ◽  
Second Law ◽  
Thermodynamic Cycles ◽  
Heat Addition ◽  
Volume Heat ◽  
Internal Heat Transfer

This paper presents an evaluation of thermodynamic cycles with the help of second law thermodynamics. In common studies thermodynamic cycles are analyzed and judged mostly just by thermal efficiency and specific power output. Another way to describe the efficiency of a cycle and to identify the potential is the analysis of the entropy production of the system. In a previous study a general investigation of thermodynamic cycles was carried out [1]. The promising technologies identified were isothermal compression and expansion, internal heat transfer and constant-volume heat addition. Based on these theoretical and idealized investigations, estimations for component efficiencies and losses were made. The present study investigates the entropy production of the thermodynamic cycles including these promising technologies. This helps to understand the interaction of the components and the effect of single components and their losses on the whole cycle. Furthermore a distinction between internal and external entropy production is made. This identifies which part of the losses occurs in the components and which amount of exergy leaves the system unused. The results finally lead to a gas turbine cycle involving compression with intercooling, internal heat transfer and constant-volume heat addition.

Simulating heat addition via mass addition in variable area compressible flows

AIAA Journal ◽  
1996 ◽  
Vol 34 (5) ◽  
pp. 1076-1078 ◽  
Author(s):  
W. H. Heiser ◽  
W. B. McClure ◽  
C. W. Wood
Keyword(s):  
Compressible Flows ◽  
Heat Addition
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