RB
R.G.A. Bolder
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2 records found
1
Master thesis
(2017)
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Robin Bolder, Angelo Cervone, Barry Zandbergen, Matteo Pini, Henk Jan van Gerner
Two-phase thermal control systems are used for payloads that require temperature stability under high and fluctuating heat output. However, the complex interaction between the two phases in a flow makes it hard to predict the performance of such a system. The goal was to develop a numerical model able to predict the transient behaviour of such a system within a 30% error margin. An existing explicit one-dimensional finite-difference simulation was expanded using new correlations from literature. The performance of this model was validated using experimental measurements gathered with the NLR two-phase demonstrator setup. The resulting numerical simulation can predict the transient behaviour of the pressure drop and liquid level in the accumulator with a mean error of 7.7% and 1.3% respectively. The goal therefore has been reached.While room remains for further improvement and validation, this model can significantly shorten the development time of new two-phase systems.
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Two-phase thermal control systems are used for payloads that require temperature stability under high and fluctuating heat output. However, the complex interaction between the two phases in a flow makes it hard to predict the performance of such a system. The goal was to develop a numerical model able to predict the transient behaviour of such a system within a 30% error margin. An existing explicit one-dimensional finite-difference simulation was expanded using new correlations from literature. The performance of this model was validated using experimental measurements gathered with the NLR two-phase demonstrator setup. The resulting numerical simulation can predict the transient behaviour of the pressure drop and liquid level in the accumulator with a mean error of 7.7% and 1.3% respectively. The goal therefore has been reached.While room remains for further improvement and validation, this model can significantly shorten the development time of new two-phase systems.
Bachelor thesis
(2013)
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J.Y. Boersma, R.G.A. Bolder, J.E. Haverkamp, A.I. van Hengel, M. Michielsen, F. Pohl, L. Roelen, E.C. Seibel, C.Y.Y. Yeung, G.G. Drijkoningen, E. Mooij