The bombardier beetle’s unique natural combustion technique is being studied to see if it can be copied for use in the aircraft industry.
The bombardier beetle in action
Credit: Thomas Eisner and Daniel Aneshansley, Cornell University
Scientists studying the bombardier beetle’s jet-based defence mechanism hope it will help to solve a problem that can occasionally occur at high altitude – re-igniting a gas turbine aircraft engine which has cut out, when the outside air temperature is as low as minus 50 degrees Centigrade!
Due to start early next year, this innovative 3-year project at the University of Leeds is being funded by the Engineering and Physical Sciences Research Council (EPSRC).
The bombardier beetle defends itself by squirting predators (ants, frogs, spiders) with a high-pressure jet of boiling liquid in a rapid-fire action called pulse combustion. Building on work by Professor Tom Eisner at Cornell University, the new project will set out to improve understanding of the beetle’s unique pulse combustion and nozzle ejection mechanism. It also aims to identify how combustion engineers could exploit this understanding to practical effect. For example, knowledge gained could aid the development of a device that helps relight aircraft engines at high altitude by squirting plasma into the engine’s combustion chamber more accurately.
The project will involve computer-based numerical and mathematical modelling. Initially it will focus on understanding the beetle’s heart-shaped miniature combustion chamber, which is less than 1 millimetre long. Simulations for a larger chamber around a few centimetres long will then be conducted, in which gases are ignited by raising the chamber’s surface temperature. The effect of different shaped nozzle outlets and explosion chambers will also be examined.
The project team will be led by Andy McIntosh, Professor of Thermodynamics and Combustion Theory at the Energy and Resources Research Institute in the University of Leeds. Professor McIntosh says: “The bombardier beetle’s defence mechanism represents a very effective natural form of combustion. Copying such natural mechanisms is part of the growing field of biomimetics where scientists learn much from intricate design features already in nature. Understanding this beetle better could lead to significant advances in combustion research.”
Jane Reck | EPSRC
Fraunhofer researchers develop measuring system for ZF factory in Saarbrücken
21.11.2017 | Fraunhofer-Institut für Zerstörungsfreie Prüfverfahren IZFP
New manufacturing process for SiC power devices opens market to more competition
14.09.2017 | North Carolina State University
High-precision measurement of the g-factor eleven times more precise than before / Results indicate a strong similarity between protons and antiprotons
The magnetic moment of an individual proton is inconceivably small, but can still be quantified. The basis for undertaking this measurement was laid over ten...
Heat from the friction of rocks caused by tidal forces could be the “engine” for the hydrothermal activity on Saturn's moon Enceladus. This presupposes that...
The WHO reports an estimated 429,000 malaria deaths each year. The disease mostly affects tropical and subtropical regions and in particular the African continent. The Fraunhofer Institute for Silicate Research ISC teamed up with the Fraunhofer Institute for Molecular Biology and Applied Ecology IME and the Institute of Tropical Medicine at the University of Tübingen for a new test method to detect malaria parasites in blood. The idea of the research project “NanoFRET” is to develop a highly sensitive and reliable rapid diagnostic test so that patient treatment can begin as early as possible.
Malaria is caused by parasites transmitted by mosquito bite. The most dangerous form of malaria is malaria tropica. Left untreated, it is fatal in most cases....
The formation of stars in distant galaxies is still largely unexplored. For the first time, astron-omers at the University of Geneva have now been able to closely observe a star system six billion light-years away. In doing so, they are confirming earlier simulations made by the University of Zurich. One special effect is made possible by the multiple reflections of images that run through the cosmos like a snake.
Today, astronomers have a pretty accurate idea of how stars were formed in the recent cosmic past. But do these laws also apply to older galaxies? For around a...
Just because someone is smart and well-motivated doesn't mean he or she can learn the visual skills needed to excel at tasks like matching fingerprints, interpreting medical X-rays, keeping track of aircraft on radar displays or forensic face matching.
That is the implication of a new study which shows for the first time that there is a broad range of differences in people's visual ability and that these...
15.11.2017 | Event News
15.11.2017 | Event News
30.10.2017 | Event News
24.11.2017 | Physics and Astronomy
24.11.2017 | Health and Medicine
24.11.2017 | Earth Sciences