During the Cultural Revolution, Luo's body, mind and family were devastated. In those years of suffering, he still persisted in his beloved scientific research work with a patriotic heart and under extremely difficult conditions. 1970 The Aviation Department of Harbin Institute of Military Engineering was merged into Northwestern Polytechnical University, and Romania was transferred to Northwestern Polytechnical University. He raced against time to take the lead in the study of transonic aerodynamics and applied the finite difference method to aircraft aerodynamic calculation for the first time in China. In 1970s, he presided over the calculation program of longitudinal aerodynamic difference of transonic-wing-horizontal tail-vertical tail combination, and won the Shaanxi Scientific Research Achievement Award 1977, and was selected into the National Defense Scientific Research Achievement Exhibition 1977. 65438-0978 participated in the National Science Conference and won the Scientific Research Achievement Award and Advanced Worker Award. 1976 solved the convergence problem of nonlinear aerodynamic calculation at high angle of attack for the first time in China. 1988, the calculated angle of attack increased to 60, and the asymmetric aerodynamic calculation results at high angle of attack were obtained for the first time in the world. From 65438 to 0983, he cooperated to study the second-order approximation method of transonic small disturbance velocity potential flow and its application in airfoil and wing flow calculation, and won the theoretical achievement award of the Ministry of Aviation Industry. 65438-0986 cooperated to study the computer simulation of S-shaped inlet flow field, and won the second prize of scientific research achievements in colleges and universities in Shaanxi Province. He was invited to conduct scientific research and give lectures at more than a dozen foreign universities and research institutes, such as Royal Swedish Institute of Technology, Federal German Aerospace Institute, Cornell University, University of Maryland, California Institute of Technology, University of Southern California, and helped establish the scientific and technological cooperation relationship between Northwestern Polytechnical University and Federal German Aerospace Institute. Thanks to his active recommendation, a group of young scientific research backbones majoring in aerodynamics can go to the Federal Republic of Germany and Sweden for further study and scientific and technological cooperation. Starting from the development of aerodynamics, Luo pointed out that "self-correcting wind tunnel" is an important research direction, guided graduate students to explore in this field, and urged the Aerodynamics Research Office to deepen this work, which made this subject achieve fruitful research results and attracted attention at home and abroad.
Luo has been employed as adjunct professor of Shanghai Jiaotong University, honorary professor of Yunnan University of Technology, adjunct professor of Changsha University of National Defense Technology, visiting professor of University of Maryland, Cornell University, California Institute of Technology, Santa Crona University and University of Southern California. Consultant to the chief designer of trunk aircraft of the Ministry of Aerospace; Commentator of American Mathematical Criticism Society, consultant and editor of Computer Methods in Applied Mechanics and Engineering in the Federal Republic of Germany, editor of Journal of Progress in Aeronautics and Mechanics, and deputy editor of Journal of Aerodynamics. He is also the director of China theoretical and applied mechanics Society, honorary director of China Aviation Society, director of China Aerodynamics Research Association, and member of the 1st, 2nd, 3rd, 4th and 5th National Symposium on Transonic Flow. He used to be a member of the Science and Technology Committee of the Ministry of Aviation Industry, a member of the theoretical and applied mechanics Discipline Group of the State Science and Technology Commission, a member of the Engineering Mechanics Group of the Technical Department of China Academy of Sciences, a representative of Heilongjiang Province, and a member of the Shaanxi Provincial Political Consultative Conference.
Luo has long been engaged in the teaching and research of aircraft component aerodynamics, transonic aerodynamics and high angle of attack aerodynamics. Over the past 40 years, he has been struggling in the front line of teaching and scientific research, trained a large number of fluid mechanics professionals for China, and guided dozens of master's and doctoral students, some of whom have become well-known scholars in China. Luo has made great contributions to aviation education and scientific research in China. The heart of a newborn baby-innocence
1950 completed his dissertation in advance at California Institute of Technology and obtained his doctorate. At this time, shortly after the founding of People's Republic of China (PRC), the people's government called on overseas scholars to return to China to participate in the construction, which was a great attraction for Romania. Encouraged by his mentor Qian Xuesen, he, Zhao Zhongyao and Shen Shanjiong resolutely embarked on the road of returning to China on August 3 1 of the same year. They left the west coast of the United States by boat and arrived at Yokohama Port in Japan on September 12.
In June this year, the Korean War broke out. When they arrived in Yokohama, the three of them were arrested by the American occupation forces stationed in Japan and put into Chaoya prison on charges of carrying confidential national defense information. At the beginning of February, 65438+, it was handed over to the "China delegation in Japan" in Tokyo, that is, the then "embassy" of the Kuomintang in Japan. Kuomintang officials persuaded them to return to the United States or Taiwan Province Province, and said that Fu Sinian, president of Taiwan Province University, had called from Taiwan Province Province to hire them as professors at Taiwan Province University. They all flatly refused and confidently replied: "China is my motherland, why can't I go back?" In the end, the us military could not catch any evidence and was forced to release people under the pressure of public opinion. At this time, it is 65438+the end of February. Luo and his two companions are like this. With a sincere heart of loving and serving the motherland, they went through hardships and threw themselves into the embrace of the motherland.
During the "Cultural Revolution", he was described as a "spy", was tortured to extract confessions, suffered from multiple disabilities, and suffered various kinds of torture and extremely unfair treatment. His wife was also forced to die ... however, his sincere heart for the motherland and his belief in the party have not changed. He said that he would always believe in the Party, and only a few people would run amok.
It is in this kind of twists and turns that his patriotism has been sublimated, from patriotism and love for the party to determination to fight for the cause of the party for life. He submitted his application for joining the party many times, expressing his willingness to give everything to the party. From 65438 to 0978, he participated in the National Science Conference and won the prize. His inner excitement is beyond words, because his work has been supported and encouraged by the party.
1980 gloriously joined the China * * * production party. Since then, he devoted himself wholeheartedly to socialist construction. He often said that during the "Cultural Revolution" in 10, compared with developed countries, the gap was not narrowed, but widened. We should redouble our efforts to make up for lost time and strive to promote the development of China's aviation industry.
Today, he is nearly old, but he is still doing his best to serve the motherland.
Study very hard
In the early 1950s, he taught in Harbin Institute of Military Engineering. The class he teaches is a famous model class in the whole hospital. The students reflected that Mr. Luo's teaching ideas were clear, his language was refined and his concepts were clear. Therefore, colleges and departments have organized many times to observe and study his classes. On the basis of lectures, after processing and sorting, he compiled his own aerodynamic lecture notes. Later, I wrote the sequel of aerodynamics lecture notes, including the theory and application of wings and slender bodies. These not only greatly enrich the teaching, but also provide valuable reference materials for the research and design of aircraft aerodynamics in China.
During the "Cultural Revolution", he was anxious about the interference and destruction of China's aviation industry. He is not afraid of blows, but only pays attention to closely linking his work with the future of the motherland and the development of the socialist cause. He deeply realized that teaching and scientific research must be closely integrated with the design and production of factories and research institutes. So he chose this most difficult direction.
In the early 1970s, he began to explore a difficult point in aerodynamic calculation-transonic aerodynamic research. When the plane flies transonic, that is, the speed is equivalent to the speed of sound propagation, which is about 0.8- 1.2 times the speed of sound. At this time, the flow around the aircraft is complex, including the mixed flow of subsonic airflow and supersonic airflow, and there is a shock wave. Theoretically, although the velocity potential equation describing this transonic flow has been established for a long time, it is a nonlinear mixed partial differential equation and cannot be solved by the general linear superposition method of pure subsonic and pure supersonic. Luo knows that transonic speed is an important flight speed range for both civil and military aircraft. Therefore, it is very important to analyze and calculate the aerodynamic characteristics of aircraft at transonic speed for aircraft design. However, how to solve nonlinear partial differential equations? The engineering method is too rough, and the conditions in China at that time did not allow wind tunnel experiments. So he consulted a lot of foreign materials and got inspiration from them. He decided to explore the transonic mixed difference method and use a computer to do numerical calculation to solve the transonic velocity potential equation. This numerical calculation method, to some people, is a tedious and tasteless "sweating" thing, and there is no profound theory to study. However, he believes that "sweating" is worthwhile as long as it is a practical problem in production and helps to solve the actual aerodynamic problems of the aircraft.
He was over 500 years old then. In order to use the appropriate computer, he often travels, often forgets to eat and sleep at work, and has a tenacious spirit of not giving up until he reaches his goal. He always goes to the computer with the programmer and stays by the computer, analyzing the data on the spot and guiding further calculation. He doesn't leave the computer room at noon, even if he eats cold steamed buns and pickles, it's lunch. 1976, his injured calf became inflamed again during the Cultural Revolution. 1977, his neck became inflamed and became lipoma. He works all day and doesn't even rest at night. In order to gain time, both Spring Festival holidays were spent in other places. After several years of hard work, he has made gratifying achievements in transonic aerodynamics and completed the general calculation program. This calculation method can improve the quality of aircraft design, shorten the development cycle and reduce the cost. This achievement filled a gap in China's aviation technology and was close to the foreign research level at that time.
In the 1980s, he began to study the subject of high angle of attack. When the aircraft flies at a high angle of attack, the airflow no longer flows smoothly along the surface of the aircraft, but produces a separated flow and forms a vortex. This kind of separated vortex often appears asymmetry on the left and right sides of the aircraft, and the vortex will break, which brings difficulties to analysis and calculation. He began to study the flow characteristics and calculation methods at high angles of attack in the late 1970s. In cooperation with others, the convergence problem of aerodynamic numerical calculation at high angle of attack is solved for the first time in China. 1988 improves the calculated angle of attack to 60, and obtains the asymmetric aerodynamic calculation results at high angle of attack for the first time in the world, which makes a breakthrough in the calculation method and has high theoretical and application value.
Teach knowledge and educate people.
Because of its high academic level, it enjoys a high reputation among its peers at home and abroad. However, he has always been strict with himself, realizing his ambition of serving the motherland with his words and deeds, and at the same time educating generations of students.
10 years, he has trained dozens of graduate students. He is not only strict with his students, but also persuasive. When guiding graduate students, he is always so careful and meticulous. He not only cares about students' professional progress, but also helps them improve their thinking. He said, that's all I know. If you don't give it to the students and the country, should you bring it into the coffin?
In the early days of reform and opening up, he was invited to give lectures abroad, but he thought that the most important thing was to do more work to train and educate young people, and let younger comrades go abroad for further study if they had the opportunity to go abroad! In this way, he was not invited to visit the United States until 1986. During his visit to the United States, on the one hand, he introduced China's achievements in aerodynamic research, on the other hand, he seized the time to absorb new technologies from abroad. He often takes the initiative to inform domestic comrades of the latest information on foreign technological development in a timely manner. What he has been thinking about is the development of motherland aviation.
People say that "Mr. Luo is a person who studies with all his heart", but he is very concerned about his students and other comrades. A family member of an experimental technician in the laboratory was ill in hospital, and he also took time out of his busy schedule to visit. Many people outside the school asked him questions. He always listens patiently to other people's problems, discusses them seriously, and takes other people's affairs as his own. He does all kinds of part-time jobs, but he never considers the remuneration.
The injured body during the Cultural Revolution forced him to lie in the hospital bed several times. It is in this case that he still reads materials and often calls graduate students to his bedside to guide their research work and revise their papers. How can his students not admire and appreciate such a mentor from the heart!