China rapidly produced many hypersonic wind tunnels one after another, more and more advanced and high end niche. No body can catch up. This news release is one of the dozens of new toys for making HGV warheads, drones, missiles, 6th gen warplanes etc.
https://mil.news.sina.com.cn/jssd/2018-09-27/doc-ihkmwytp3995896.shtml
国之重器FL62风洞亮相：中国下代战机什么样它说了算
即将建成的FL-62风洞作为国际上最先进的大型连续式跨声速风洞之一，实现了我国大尺寸风洞从暂冲式向连续式的跨越。风洞流场品质、试验数据质量、试验效率均处于国际先进行列，8万千瓦主驱动压缩机、电机、变频器等多项技术填补了国内空白。
辽宁省沈阳市沈北新区，一间航空工业现代化实验室中坐落着一个容积约17000立方米，重约6620吨的庞然大物。
说起这个庞然大物，它的研制难度不亚于任何一个飞机型号，除航空航天领域外，它还可以为能源、交通、建筑、环保等众多领域提供高品质的试验数据，它就是我国第一座大型连续式跨声速风洞—FL-62风洞。
“风洞”是什么？有啥用？
FL-1风洞实验室
通俗来说，“风洞”就是用来产生人造气流的管道，它利用人工产生和控制气流，以模拟飞行器等物体在自然环境中的气流运动状况，同时可以观察、量度气流对物体的作用。
The country's heavyweight FL62 wind tunnel debut: what is the next generation of Chinese fighters?
As soon as the FL-62 wind tunnel to be built is one of the most advanced large-scale continuous transonic wind tunnels in the world, it has realized the leap from the temporary to the continuous type of wind tunnels in China. Wind tunnel flow field quality, test data quality, and test efficiency are all in the international advanced ranks. The 80,000 kW main drive compressor, motor, inverter and other technologies have filled the domestic gap.
In the Shenbei New District of Shenyang City, Liaoning Province, a modern laboratory for aviation industry is located in a huge volume of about 17,000 cubic meters and weighs about 6,620 tons.
Speaking of this behemoth, it is as difficult to develop as any aircraft model. In addition to the aerospace industry, it can also provide high-quality test data for energy, transportation, construction, environmental protection and many other fields. It is the first in China. Large continuous transonic wind tunnel - FL-62 wind tunnel.
What is the "wind tunnel"? Is it useful?
FL-1 Wind Tunnel Laboratory
Generally speaking, “wind tunnel” is a pipeline used to generate artificial airflow. It uses artificially generated and controlled airflow to simulate the airflow movement of objects such as aircraft in the natural environment, and can observe and measure the effect of airflow on objects.
"Wind tunnel" is a key ground test facility for the development of aircraft. It has a very important leading role in the development of aviation aircraft. Some people have visually referred to wind tunnel test as the "first mover" of aircraft development, and there is no advanced wind tunnel test equipment. It is impossible to develop advanced aerospace vehicles. Take the US F-22 Raptor, its development has gone through 10 years of wind tunnel testing. Its 23 models have been carried out in 15 different types of wind tunnels, totaling about 4.4. The 10,000-hour high- and low-speed wind tunnel test finally determined the optimal aerodynamic shape of the F-22 Raptor, earning it the title of “Most Strong Fighter”.
Wind tunnel flow shows PIV test
Therefore, the quantity and quality of wind tunnel facilities has become an important symbol for measuring the level of aerospace basic technology in a country today. With the development of industrial aerodynamics, wind tunnels not only play an important role in the research and development of aerospace and aerospace engineering, but also become more and more widely used in transportation, building construction, wind energy utilization and environmental protection. .
The heavy weight of the country FL-62 wind tunnel
FL-62 wind tunnel experimental section
The FL-62 wind tunnel is a continuous transonic wind tunnel independently developed by the aviation industry. With conventional force measurement, pressure measurement and port test capabilities. For conventional force test, continuous measurement, model active vibration suppression, hole wall interference and support disturbance real-time correction can be realized. At the same time, special test capabilities such as aeroelasticity, dynamic simulation, thrust vector, dynamics, acoustics, flow display, multi-body interference and separation are planned for various aircraft development needs.
The FL-62 wind tunnel has multiple interchangeable test sections to best meet different types of test requirements. The main compressor, motor and inverter of the power system are the first set of equipment to fill the domestic blank. The system is complex and difficult to develop.
The FL-62 wind tunnel auxiliary system includes a cabin air extraction system, an air supply and exhaust system, a circulating water cooling system, a high pressure gas source system, a power supply system, and a measurement and control system. The FL-62 wind tunnel uses an internal and external dual-cycle cooling system to control temperature changes in the cavern.
External compressor system
The wind tunnel received a large number of design verification work in the early stage and was approved in 2012. The FL-62 wind tunnel is the largest single investment project approved by the National Defense Science and Technology Bureau. It is a fundamental and strategic facility for the development of China's aviation industry. It is the backbone wind tunnel that supports the development of China's advanced aircraft. The "national heavy weapon" that promotes the development of the national economy and the innovation of national defense science and technology, and the construction of this "heavy weapon of the country" is the only way for China to move from a major aviation country to a strong aviation country.
Compressor system interior
Improve the operating efficiency, the FL-62 wind tunnel uses a number of advanced technologies such as semi-flexible wall nozzle, central body two throat, quarantine isolation door and bypass circuit, which can quickly establish supersonic flow field and continuously and accurately control Mach number. The function of replacing the test piece when the compressor is not completely stopped.
Create a world-class wind tunnel
FL-62 wind tunnel
As one of the most advanced large-scale continuous transonic wind tunnels in the world, the FL-62 wind tunnel has realized the transition from the temporary to the continuous type of large-scale wind tunnels in China. Wind tunnel flow field quality, test data quality, and test efficiency are all in the international advanced ranks. The 80,000 kW main drive compressor, motor, inverter and other technologies have filled the domestic gap.
The FL-62 wind tunnel has a difficult design, long construction period and large investment. It involves the development of large-scale axial compressors, wind tunnel reduction and noise reduction, wind tunnel temperature regulation, transonic flow field control, and design and manufacture of large-sized structural parts. , flexible wall nozzle design and debugging, large-scale motor development, wind tunnel multi-parameter integrated control and other key technologies. The FL-62 continuous transonic wind tunnel will be built. Each of its footprints is deeply impressed by the aviation people's continuous efforts on their dreams. Each process records the unremitting persistence of aviation people.
Look forward to more countries to catch up with the wind! Stunning the world! (Author's signature: see aviation)
“风洞”是研制飞行器的关键地面试验设施，在航空飞行器研制中具有非常重要的主导作用，有人就形象地把风洞试验称作飞行器研制的“先行官”，没有先进的风洞试验设备，就不可能研制出先进的航空飞行器。就拿美国的F-22“猛禽”战斗机来说，它的研制就历经了10年的风洞试验过程，它的23种模型先后在15座不同类型的风洞进行了75项、合计约4.4万小时的高低速风洞试验，才最终确定了F-22“猛禽”战斗机最优的气动外形，为它赢得了“最强战机”的称号。
风洞流动显示PIV试验
因此，风洞设施的数量和质量已经成为当今世界衡量一个国家航空航天基础技术水平的重要标志。随着工业空气动力学的发展，风洞不仅在航空和航天工程的研究和发展中起着重要作用，在交通运输、房屋建筑、风能利用和环境保护等方面中也得到越来越广泛的应用。
国之重器FL-62风洞
FL-62风洞实验段
FL-62风洞是航空工业自主研制的连续式跨声速风洞。具备常规测力、测压和进气道试验能力。对于常规测力试验，可实现连续测量、模型主动振动抑制、洞壁干扰与支撑干扰实时修正。同时，针对各类飞行器研制需求规划了气动弹性、动力模拟、推力矢量、动态、声学、流动显示、多体干扰与分离等特种试验能力。
FL-62风洞具有多个可更换试验段，可以最大程度地满足不同类型试验需求。动力系统的主压缩机、电机及变频器均为填补国内空白的首台套设备，系统复杂、研制难度大。
FL-62风洞辅助系统包括驻室抽气系统、供排气系统、循环水冷却系统、高压气源系统、供电系统和测控系统。FL-62风洞采用内外双循环冷却系统以控制洞体内的温度变化。
压缩机系统外部
风洞经过前期大量的设计验证工作，于2012年获得立项批复。FL-62风洞是国家国防科工局批复的单体投资最大的建设项目，是我国航空工业发展至关重要的基础性、战略性设施，是支撑我国先进飞行器研制的骨干型风洞，是促进国民经济发展和国防科技创新的“国之重器”，建设这一“国之重器”是我国由航空大国迈向航空强国的必经之路。
压缩机系统内部
提高运行效率，FL-62风洞采用了半柔壁喷管、中心体二喉道、驻室隔离门和旁通回路等多项先进技术，可实现快速建立超声速流场、连续精确控制马赫数、压缩机不完全停车状态下更换试验件的功能。
打造国际一流风洞
FL-62风洞
FL-62风洞作为国际上最先进的大型连续式跨声速风洞之一，实现了我国大尺寸风洞从暂冲式向连续式的跨越。风洞流场品质、试验数据质量、试验效率均处于国际先进行列，8万千瓦主驱动压缩机、电机、变频器等多项技术填补了国内空白。
FL-62风洞设计难度大、建设周期长、投资大，涉及了大型轴流压缩机研制、风洞减湍降噪、风洞温度调节、跨声速流场控制、大尺寸结构件设计与制造、柔壁喷管设计调试、大型电机研制、风洞多参数综合控制等多项关键技术。即将建设完成的FL-62连续式跨声速风洞，它的每一个足迹都深深刻印着航空人对梦想的不断努力，每一段历程都记载着航空人对品质的不懈坚持。
期待更多国之重器迎风而起！惊艳世界！（作者署名：看航空）
via Shanghaiist
