At its new facility, NDTL completes tests of the Hermeus Chimera engine for hypersonic flight

In November, the Atlanta-based startup Hermeus reached a milestone in hypersonic flight at a University of Notre Dame research facility.

Just over a year ago, Hermeus approached Notre Dame's Turbomachinery Lab (NDTL) and discussed its plans to develop a Mach 5 commercial aircraft. To support this effort, Hermeus's engineers needed to test the startup's new engine, Chimera.…

Read More

NDTL addresses environmental impact of aero-propulsion engines with ITAP Engine Concept


Commercial aircraft have an environmental impact that will continue to grow as demand further increases. This is balanced by the many derived social benefits as air transport has become widely accessible to the world’s population. Work will continue developing alternative concepts such as electric and hydrogen propulsion systems, but until significant technical breakthroughs occur in these technologies, commercial air travel will continue to rely on gas turbine engines that burn fossil fuels.…

Read More

Results of an advanced compressor casing treatment with efficiency increase

Axial compressor systems are a key component in gas-turbine engines for aviation and power generation. The ability of the compressor to increase gas pressure is limited by a phenomenon known as stall. A developing technology for mitigating stall is “Casing Treatments”.  This refers to features such as slots or grooves machined into the casing around the compressor. Casing treatments are understood to reduce the likelihood of stall in a compressor but are generally associated with increased manufacturing costs and a decrease in efficiency.

Read More

Aerodynamic forcing models for compressor aeromechanics

Blade vibration in turbomachinery components may lead to unwanted acoustic noise and material fatigue. The vibration is often caused by unsteady aerodynamic pressure forces on the surface of the blades. These pressure forces can be related to a wide variety of different physical mechanisms. Hence, predicting blade vibration at the design stage of a compressor or turbine is challenging. As a result, turbomachinery components are often tested over their anticipated operating range in order to investigate potential blade vibration issues.

Read More

Experimental investigation of distortion on a transonic axial compressor rotor

Axial compressor systems are essential in gas-turbine engines for aviation and power generation. An issue related to compressor operation is non-uniformity in the fluid properties in the approach flow to the compressor. These non-uniformities may include temperature or pressure variations around the compressor’s annulus. These can be caused by crosswinds or interactions between an engine and the airframe, for example. Further, the non-uniformities are known to lead to decreased performance and efficiency of the compressor.  …

Read More

Investigation of a novel propulsor for urban air mobility

The Notre Dame Turbomachinery Laboratory (NDTL) and Jetoptera recently partnered to conduct a Small Business Technology Transfer (STTR) proof-of-concept (Phase I) study of Jetoptera's Fluid Propulsive System Thruster. The Fluid Propulsive System (FPS™) is a novel architecture that uses a source of compressed air to produce thrust. The FPS™ is a patented, scalable means to power a range of aircraft for both VTOL and STOL applications.

Read More

NDTL to host SAE and AIAA TETWoG Fall 2021 Meetings

The Notre Dame Turbomachinery Laboratory (NDTL) will host the 185th biannual SAE International Aerospace Technical Committee EG-1E (Gas Turbine Engine Test Facilities and Equipment) Meeting and the 106th biannual AIAA Turbine Engine Testing Working Group (TETWoG) Meeting at the University of Notre Dame, October 6-8, 2021.…

Read More

Carrier Global Corporation Partners with NDTL

Mc 10

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.…

Read More

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.…

Read More

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

Hot Wire

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-

Read More

NDTL to Build and Test 10MW-Class sCO2 Compressors



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

Read More

Aeromechanics of a Power Turbine


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

Read More

NDTL and NASA Collaborate to Study Broadband Noise Control


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.…

Read More

NDTL Advances Numerical Modeling of Turbulent Combustion

Was Les

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.

Read More