The Unique Power Unit for the Next Generation of Air Mobility
Background
As the rapid development of next-generation air mobility such as eVTOLs and large drones, small gas turbine generators are gaining attention as the power source.
| Lithium-ion Battery | Reciprocating Engine | Rotary Engine | Gas Turbine Engine | |
|---|---|---|---|---|
| Output power density W/kg | △ | △ | 〇 | ◎ |
| Energy density J/kg | △ | 〇 | 〇 | ◎ |
| Scalability in size and output power |
△
More units → High power, Large capacity, but Heavier |
△
Greater volume and weight for higher power output |
×
No large-scale models developed, and poor efficiency |
◎
Scalable power without structural changes |
| Charging・Fuel | Large-scale rapid charging unit | Gasoline / diesel fuel | Multi-fuel capability including hydrogen | Muli-fuel capability (SAF, hydrogen, etc.) |
We are currently developing a next-generation, ultra-lightweight, and highly compact gas turbine generators. Aiming for world-class performance in the 30-500 kW power range for the air mobility sector, our design combines both high power density and high energy density
・Achieves a compact, lightweight design with improved reliability and reduced costs through direct axial connection, internal integration, and a reduced number of parts.
・The GT and GEN are housed in a single, integrated structure
・Uses a high-efficiency, high-speed Halbach array field-type GEN
・Achieves stable combustion through a swirling flame
・Enhances mixing with a high-speed flow to achieve low NOx emissions.
・Realizes a 100 % flashback-free structure for hydrogen combustion.
・A generator with a Halbach array field magnet enables a lightweight design, high efficiency, and high power density
・Enables high-speed rotation design because coil losses are not affected by rotational speed.
・Achieves precise designs through analysis using AxSTREAMⓇ, developed by Softinway Inc. (USA)
・3D models are applied to Additive Manufacturing (AM)
・Monolithic fabrication of complex shapes and guaranteed performance by ensuring proper roughness in fluid passages
・Simultaneously achieves a reduced part count, lower manufacturing costs, and shorter lead times.
・The ECU is designed to be adaptable for use as an ECB (Engine Control Box) for rocket engines
・Designed with future platform sharing in mind.
Thanks to their ultra-lightweight design, our gas turbine generators can also be used as portable generators.
They can be provided as an emergency power source during disasters or as a standalone power source in areas with underdeveloped infrastructure.
Fully leveraging technology and expertise from our gas turbine generator development
Background
In recent years, with the diversification and miniaturization of satellite launches, demand has dramatically increased for small commercial rockets (including reusable rockets) that can be launched quickly and at a low cost.
ADJ provides end-to-end design and manufacturing of rocket engines optimized for small commercial rockets.
By applying advanced aerodynamic design technology with AxSTREAM® and leveraging the latest CAE analysis and AM technologies, we achieve manufacturing with short lead times and low costs.
・We possess the design technology for turbopumps in the 500N to 100-ton thrust class.
・Our small electric pumps, combined with Halbach motors, can be designed for all working fluids from ambient to cryogenic temperatures.
・Our high-speed, single-shaft turbopump—integrating the fuel, oxidizer, and turbine shafts with an annular gas generator—is the ultimate compact, lightweight turbopump design technology (a fusion of rocket and jet engine technologies)
・Through AM-centric manufacturing, we produce complex shapes monolithically, achieving both reduced manufacturing costs and shorter lead times.
・The gas generator, conventionally a separate component, is designed in an annular shape and integrated with the main body of the turbopump.
・This achieves ultimate weight reduction, a lower part count, fewer assembly man-hours, and reduced thermal and fluid-dynamic losses.
Achieves both high-precision thrust control and stable combustion, delivering optimal performance for small rocket engines
