HackadayIf You Like The Sound of a Thermoacoustic Stirling Engine, Check Out These Plans
If You Like The Sound of a Thermoacoustic Stirling Engine, Check Out These Plans https://hackaday.com/2026/03/14/if-you-like-the-sound-of-a-thermoacoustic-stirling-engine-check-out-these-plans/
#EngineHacks #Stirlingengine #Thermoacousticengine #Thermoacoustics
#EngineHacks #Stirlingengine #Thermoacousticengine #Thermoacoustics
Prof. R. I. SujithOur reduced-order modeling approach to obtain a low-dimensional, analytically tractable model, captures both continuous & abrupt transitions to thermoacoustic instability observed in experimental observations; got published in @APSphysics
doi.org/10.1103/kf5z-xy15
#Thermoacoustics #NonlinearDynamics
#DynamicalSystems #ReducedOrderModeling #Combustion #Publication #IITMadras
📢PhD Defense
Data-driven modeling and prediction of onset of instability in thermoacoustic systems
🎤@jayeshdhadphale, IIT Madras
📅Jan 13 2026
⏰18:00 IST | 07:30 EST | 13:30 CET | 04:30 PST
🔗https://meet.google.com/dqr-mxwb-ztr
#PhDDefense #Thermoacoustics #IITMadras #AerospaceEngineering #MachineLearning #Phd
Data-driven modeling and prediction of onset of instability in thermoacoustic systems
🎤@jayeshdhadphale, IIT Madras
📅Jan 13 2026
⏰18:00 IST | 07:30 EST | 13:30 CET | 04:30 PST
🔗https://meet.google.com/dqr-mxwb-ztr
#PhDDefense #Thermoacoustics #IITMadras #AerospaceEngineering #MachineLearning #Phd
miguel_pachecoLooking for literature about #thermoacoustics I found this paper written Ukrainian researchers in Mykolayiv, who keep publishing during the #ukrainian war (in colab with an coauthor in China)
Amazing.
Improving Thermoacoustic Low-Temperature Heat Recovery Systems
The existence and development of modern society require significant amounts of available energy. Combustion engines are the main sources of heat. Their operation is accompanied by the formation of large volumes of emissions, which have different temperatures and contain harmful substances ejected into the environment. Therefore, the urgent problem today is the reduction in heat emissions. This might be achieved through a reduction in the amount of these pollutants by improving primary heat engines, converting to new, alternative types of fuel, and at the same time, to carbon-free fuel. However, such measures only reduce the temperature level of waste heat but not its volume. Conventional technologies for the utilization of heat emissions are ineffective for using heat with temperatures below 500 K. Thermoacoustic technologies can be used to convert such low-temperature heat emissions into mechanical work or electricity. This article is focused on analyzing the possibilities of improving the thermoacoustic engines of energy-saving systems through the rational organization of thermoacoustic energy conversion processes. An original mathematical model of energy exchange between the internal elements of thermoacoustic engines is developed. It is shown that the use of recuperative heat exchangers in thermoacoustic engines leads to a decrease in their efficiency by 10–30%. From the research results, new methods of increasing the efficiency of low-temperature engines of energy-saving systems are proposed.
hackaday unofficialDemonstrating ThermoAcoustics With The Rijke Tube
The Rijke tube is a very simple device that demonstrates the principle of thermoacoustics quite clearly. Construction is quite straightforward, simply place a metal gauze at the bottom end of a tube, approximately one quarter of the way up, apply a source of heat to the gauze, and instant sound. The heat produces convection, setting up a longitudinal standing wave. This is due to air passing over the hot gauze, suddenly expanding and causing a pressure change, which rushes out the tube. Next, the airflow cools and slows, and air starts to head back into the tube, and the cycle repeats. Adjusting the tube length by slipping a sleeve over it, adjusts the pitch of the note, simply because the air has a different distance to travel. If there is a flame aimed at the gauze from below, the sound will stop since the air is already hot when it hits the hot gauze, no pressure change occurs, and no oscillation.
As [Keith], the reader who sent in the tip, suggests it would be fun to attach a servo to a sleeve on the tube, build multiple units and hang the whole thing off a MIDI controller. This could make for some fun times, and we have to agree. The problem of keeping the gauze hot could be solved in a number of ways, direct resistive heating could work, but maybe inductive heating would be cleaner?
Now, we can't find an instrument which works in this manner, which sounds like a hack in the making for someone out there so inclined.
There have been a few fire-orientated musical devices over the years, such as this Rijke Tube Organ, various variants on the pyrophone, including this neat one performing with a tesla coil, and while we're talking about music fire, howsabout a two dimensional rubens' tube variant?
Thanks [Keith] for the tip!
