News

Carrier Global Corporation Partners with NDTL

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The Notre Dame Turbomachinery Laboratory (NDTL) and Carrier Global Corporation (Carrier) have entered into a 3-year research and testing agreement. A new 2200T calorimeter test stand for centrifugal refrigerant compressor development testing will be located at NDTL’s Ignition Park facility in South Bend, Indiana, USA. Carrier’s investment will bring new test capability to NDTL and is part of the recently established Carrier Center of Excellence at the University of Notre Dame. Construction of the test cell started in June 2021; the new facility will be commissioned by the end of the year.…

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Calibration of Spalart-Allmaras Model for Simulation of Corner Flow Separation in Linear Compressor Cascade

The adverse pressure gradient and aerodynamic flow interactions within axial compressors lead to suction surface flow separation and recirculation at the rotor trailing edge hub corner. Corner flow separation appearance and size variation, with respect to flow incidence, affects blade loading, blockage area, and entropy generated performance loss during both on- and off-design operation. Accurate prediction of this complex non-equilibrium turbulent flow typically requires eddy resolving simulations (DES, LES, etc.). However, the computational cost associated with these models for industry relevant Reynolds number flows is unacceptable in the design process. As such, lower cost RANS models are a standard in the component design process despite known difficulties predicting the non-equilibrium flow phenomena characterizing separated flows.…

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Hot-Wire Probe Design and Calibration for High-Speed, High-Temperature Flows

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The use of hot-wire anemometry in high-speed, high-temperature flows with large temperature variations presents unique challenges for probe calibration, design, and survivability. Researchers at the Notre Dame Turbomachinery Laboratory (NDTL) have developed a custom hot-wire probe design and sensor attachment procedure. The design employs high-

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NDTL to Build and Test 10MW-Class sCO2 Compressors

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The use of supercritical CO2 (or sCO2) as the working fluid in closed-loop Brayton Cycles and advanced electrothermal energy storage systems has shown great promise in delivering electricity with high efficiency, creating fuel flexibility, and reducing power-plant size and cost. A number of new technology advancements, however, must be realized in order to make sCO2

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Aeromechanics of a Power Turbine

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Gas-turbine engines provide a large percentage of the electricity used around the world. The turbine blades that deliver the shaft power to generators must be able to withstand high mechanical stress, extreme heat, and unsteady aerodynamic forces. Under some circumstances, a self-excited aeroelastic instability—termed flutter

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NDTL and NASA Collaborate to Study Broadband Noise Control

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NASA Glenn Research Center and the Notre Dame Turbomachinery Laboratory (NDTL) are working together to understand and control broadband noise created by turbofan engines. The Advanced Noise Control Fan (ANCF) shown above (left) is an experimental facility with a 4-foot diameter fan that rotates at speeds up to 1800 RPM. The project objectives include the study and control of the broadband noise generated by the fan stage. Actuators have been placed on the fan’s stator (above right) with the intent of using active control to reduce noise observed in the far field.…

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NDTL Advances Numerical Modeling of Turbulent Combustion

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The accurate and efficient simulation of combustion flows remains a significant challenge. Recent advancements in turbulence modeling and numerical algorithms at the Notre Dame Turbomachinery Laboratory (NDTL) have demonstrated promising new capabilities. The temperature contours shown above illustrate the Wavenumber Adaptive Simulation (WAS) method developed at NDTL as well as the solution from a traditional Large Eddy Simulation (LES). The WAS technique is a form of hybrid turbulence model that is both accurate and numerically efficient. Both simulations provided a similar level of resolution and accuracy, while the WAS required approximately half of the computational costs.

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Engineering students gain real-world experience at Notre Dame Turbomachinery Laboratory

Eleven undergraduate students from the University of Notre Dame and surrounding region are participating in a summer internship program offered by the Notre Dame Turbomachinery Laboratory (NDTL). Interns are assigned an NDTL mentor for 10 weeks and engage in various research and development projects that provide real-world engineering experience.

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First additively manufactured integrally bladed rotor displayed at the Farnborough International Airshow

The first additively manufactured integrally bladed rotor (IBR) was proudly displayed at the Farnborough International Airshow in July. The IBR is a collaboration between the Notre Dame Turbomachinery Laboratory (NDTL), Norsk Titanium (Norsk), Pratt & Whitney and TURBOCAM International as they develop and test additively manufactured turbomachinery components. This collaboration will focus on exploring the applicability of Norsk’s Rapid Plasma Deposition™ (RPD™) material to turbomachinery applications. As part of this effort, NDTL will test an additively manufactured IBR produced and inspected to meet the applicable quality specifications used in Pratt & Whitney’s current turbomachinery components. The team has completed the initial phase of testing, with TURBOCAM International conducting machining trials of Norsk’s RPD™ material and Pratt & Whitney successfully inspecting the material to the same specification as forged turbomachinery components. …

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10MW Test Cell Inlet Installation

The 10MW test cell at the Notre Dame Turbomachinery Laboratory (NDTL) is nearing completion with the installation of an inlet. The inlet has been designed for compressor testing with a mass flow on the order of 100 lbm/s. Aerodynamic design and flow conditioning have been supported by using CFD tools in order to guarantee uniform flow at the compressor inlet and low pressure losses in the operating range. The low loss design makes it possible to reach low compressor pressure ratios in choked conditions.…

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Notre Dame Turbomachinery Laboratory collaborates with Williams International to support jet engine testing

The Notre Dame Turbomachinery Laboratory (NDTL) at the University of Notre Dame has entered into an 11-month agreement with Williams International (WI) to support jet engine testing using advanced instrumentation methods developed by NDTL researchers. Engine testing will occur in two phases with the first phase to begin in January 2018 at the WI campus in Michigan. After the test, NDTL will have supported its first full scale jet engine test.

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NDTL Director named member of Michiana 40 Under 40 Class of 2017

NDTL Director Joshua D. Cameron has been named a member of the Michiana Forty Under 40 Class of 2017 by the South Bend Regional Chamber of Commerce. According to the regional chamber’s website, “Michiana Forty under 40 recognizes 40 regional business and professional leaders who have achieved success before the age of 40. This recognition shines the spotlight on 40 of the area's most talented and dedicated young executives, professionals and leaders who demonstrate career success and community engagement.” Cameron and the other honorees will be recognized at a luncheon and profiled in the South Bend Tribune in May.…

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NASA's ANCF Spinning at NDTL

In 2016, NASA moved its Advanced Noise Control Fan facility (ANCF) to the University of Notre Dame where it is currently being commissioned by the Notre Dame Turbomachinery Laboratory (NDTL) at its on-campus facilities. ANCF is used to study the acoustics of jet engines. NDTL will be collaborating with NASA and industry partners to continue this research and discover new noise reduction technologies.…

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Numerical Simulation of NDTAC Flow Field

The animation displays a numerical simulation of the Notre Dame Transonic Axial Compressor (NDTAC) flow field using Very Large Eddy Simulation (VLES) approach; the Q criterion is colored by the total pressure field.

The simulation was performed in a single reference frame (SRF) using ~7,000,000 cells with a mesh designed to produce y+ values of 1. Subgrid-scale model was based on k-omega SST turbulence closure while LES limit was consistent with coherent structure model.…

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