@misc{PorteousGeyerMoreauetal., author = {Porteous, Ric and Geyer, Thomas and Moreau, Danielle J. and Doolan, Con}, title = {A correction method for acoustic source localisation in convex shear layer geometries}, series = {Applied Acoustics}, volume = {130}, journal = {Applied Acoustics}, issn = {0003-682X}, doi = {10.1016/j.apacoust.2017.09.020}, pages = {128 -- 132}, language = {en} } @inproceedings{MoreauGeyerDoolanetal., author = {Moreau, Danielle J. and Geyer, Thomas and Doolan, Con and Sarradj, Ennes}, title = {Influence of Camber on Wall-Mounted Finite Airfoil Tonal Noise Generation}, series = {4th Symposium on Fluid-Structure-Sound Interactions and Control, Tokio, 2017}, booktitle = {4th Symposium on Fluid-Structure-Sound Interactions and Control, Tokio, 2017}, publisher = {Springer}, address = {Singapore}, isbn = {978-981-10-7542-1}, pages = {337 -- 342}, language = {en} } @inproceedings{GeyerMoreauSarradjetal., author = {Geyer, Thomas and Moreau, Danielle J. and Sarradj, Ennes and Doolan, Con}, title = {Zur Schallentstehung an dreidimensionalen wandgebundenen Tragfl{\"u}gelprofilen}, series = {Fortschritte der Akustik - DAGA 2018, 44. Jahrestagung f{\"u}r Akustik, 19.-22. M{\"a}rz 2018 in M{\"u}nchen}, booktitle = {Fortschritte der Akustik - DAGA 2018, 44. Jahrestagung f{\"u}r Akustik, 19.-22. M{\"a}rz 2018 in M{\"u}nchen}, publisher = {Deutsche Gesellschaft f{\"u}r Akustik}, address = {Berlin}, pages = {1587 -- 1590}, language = {de} } @misc{MoreauGeyerDoolanetal., author = {Moreau, Danielle J. and Geyer, Thomas and Doolan, Con and Sarradj, Ennes}, title = {Surface curvature effects on the tonal noise of a wall-mounted finite airfoil}, series = {The Journal of the Acoustical Society of America}, volume = {143}, journal = {The Journal of the Acoustical Society of America}, number = {6}, issn = {1520-8524}, doi = {10.1121/1.5040981}, pages = {3460 -- 3473}, abstract = {This paper is concerned with the influence of camber on the noise of a wall-mounted finite airfoil with natural boundary layer transition. Tonal noise measurements taken in an aeroacoustic wind tunnel are presented for airfoils with aspect ratio of 2, NACAxx12 profile and camber between 0 and 6\% at 40\% chord. The results show camber is an important parameter that determines the operating conditions for which acoustic tone generation occurs and the number and intensity of the tones produced. Airfoils with 0\%-2\% camber have an acoustic signature that is dominated by a high amplitude primary tone, whereas the spectra of airfoils with higher camber of 4\%-6\% feature a more pronounced side tone structure. Tonal noise production does not collapse with lift coefficient, demonstrating that the local flow conditions influence the noise source. Tonal noise production is explained in terms of changes to mean flow topology, namely the location of flow separation, which is linked to tonal noise generation. Scaling of airfoil tonal noise is found to vary with angle of attack and pressure gradient. Empirical scaling laws for the primary tone frequency dependence on velocity are also derived for the cambered airfoils.}, language = {en} } @misc{GeyerMoreauGiesleretal., author = {Geyer, Thomas and Moreau, Danielle J. and Giesler, Jens and Hall, Philipp and Sarradj, Ennes and Doolan, Con}, title = {Measurement of the noise generated by wall-mounted airfoils of different thickness}, series = {24th AIAA/CEAS Aeroacoustics Conference 2018, Atlanta, USA, 25 June - 29 June 2018, (AIAA 2018-3796)}, journal = {24th AIAA/CEAS Aeroacoustics Conference 2018, Atlanta, USA, 25 June - 29 June 2018, (AIAA 2018-3796)}, publisher = {AIAA}, address = {Reston, Va}, isbn = {978-1-62410-560-9}, language = {en} } @misc{ZouScottBordenetal., author = {Zou, Zhihui and Scott, Michael A. and Borden, Michael J. and Thomas, Derek C. and Dornisch, Wolfgang and Brivadis, Ericka}, title = {Isogeometric B{\´e}zier dual mortaring: Refineable higher-order spline dual bases and weakly continuous geometry}, series = {Computer Methods in Applied Mechanics and Engineering}, volume = {333}, journal = {Computer Methods in Applied Mechanics and Engineering}, issn = {0045-7825}, doi = {10.1016/j.cma.2018.01.023}, pages = {497 -- 534}, abstract = {In this paper we develop the isogeometric B{\´e}zier dual mortar method. It is based on B{\´e}zier extraction and projection and is applicable to any spline space which can be represented in B{\´e}zier form (i.e., NURBS, T-splines, LR-splines, etc.). The approach weakly enforces the continuity of the solution at patch interfaces and the error can be adaptively controlled by leveraging the refineability of the underlying slave dual spline basis without introducing any additional degrees of freedom. As a consequence, optimal higher-order convergence rates can be achieved without the need for an expensive shared master/slave segmentation step. We also develop weakly continuous geometry as a particular application of isogeometric B{\´e}zier dual mortaring. Weakly continuous geometry is a geometry description where the weak continuity constraints are built into properly modified B{\´e}zier extraction operators. As a result, multi-patch models can be processed in a solver directly without having to employ a mortaring solution strategy. We demonstrate the utility of the approach on several challenging benchmark problems.}, language = {en} }