Compressible gas density measurement by means of Fourier analysis of interferograms

Telega, Józef Joachim; Szwaba, Ryszard; Śmiałek, Małgorzata A.

doi:10.1016/j.measurement.2021.110458

Cited by 2 publications

(2 citation statements)

References 21 publications

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“…Changing the cross section of the blade in supersonic flow influences the local Mach number and conditions in a significant manner. As this change is variant along the span, it also makes it impossible to use optical methods of visualisation such as the very widely used basic schlieren described by Smits in [ 21 ] visualization, or the FTFA interferometric analysis described by Telega et al in [ 22 ], since there the result is ‘integrated’ along the optical path, i.e., across the tunnel.…”

Section: Resultsmentioning

confidence: 99%

Suitableness of SLM Manufactured Turbine Blade for Aerodynamical Tests

et al. 2023

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This paper describes some insights on applicability of a Selective Laser Melting and Direct Metal Laser Sintering technology-manufactured turbine blade models for aerodynamic tests in a wind tunnel. The principal idea behind this research was to assess the possibilities of using ‘raw’ DLMS printed turbine blade models for gas-flow experiments. The actual blade, manufactured using the DLMS technology, is assessed in terms of surface quality (roughness), geometrical shape and size (outline), quality of counterbores and quality of small diameter holes. The results are evaluated for the experimental aerodynamics standpoint. This field of application imposes requirements that have not yet been described in the literature. The experimental outcomes prove the surface quality does not suffice to conduct quantitative experiments. The holes that are necessary for pressure measurements in wind tunnel experiments cannot be reduced below 1 mm in diameter. The dimensional discrepancies are on the level beyond acceptable. Additionally, the problem of ‘reversed tolerance’, with the material building up and distorting the design, is visible in elements printed with the DLMS technology. The results indicate the necessity of post-machining of the printed elements prior their experimental usage, as their features in the ‘as fabricated’ state significantly disturb the flow conditions.

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Section: Resultsmentioning

confidence: 99%

Suitableness of SLM Manufactured Turbine Blade for Aerodynamical Tests

et al. 2023

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“…This method, originating from the field of "large scale" thermoaerodynamics [41,42], is still a challenge in terms of application for heat exchangers. Some of the reasons for this are due to the different geometries and the problems with optical access, making it very difficult to use the methods that are widely available in the before mentioned field of thermodynamics [43] that give a good insight into the temperature field.…”

Section: Introductionmentioning

confidence: 99%

Performance analysis and PCM selection for adsorption chiller aided by energy storage supplied from the district heating system

2023

Archives of Thermodynamics

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The paper presents a theoretical analysis of thermal energy storage filled with phase change material (PCM) that is aimed at optimization of an adsorption chiller performance in an air-conditioning system. The equations describing a lumped parameter model were used to analyze internal heat transfer in the cooling installation. Those equations result from the energy balances of the chiller, PCM thermal storage unit and heat load. The influence of the control of the heat transfer fluid flow rate and heat capacity of the system components on the whole system operation was investigated. The model was used to validate the selection of Rubitherm RT62HC as a PCM for thermal storage. It also allowed us to assess the temperature levels that are likely to appear during the operation of the system before it will be constructed.

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Compressible gas density measurement by means of Fourier analysis of interferograms

Cited by 2 publications

References 21 publications

Suitableness of SLM Manufactured Turbine Blade for Aerodynamical Tests

Suitableness of SLM Manufactured Turbine Blade for Aerodynamical Tests

Performance analysis and PCM selection for adsorption chiller aided by energy storage supplied from the district heating system

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