Huang Jia

Nanchang Hangkong University

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Xiaoguang Yang

Nanjing University

Yun Jiang

Guizhou University

Duoqi Shi

Beihang University

Xuefeng Teng

Nanchang Hangkong University

Longbiao Li

Nanjing University of Aeronautics and Astronautics

Fencheng Liu

Nanchang Hangkong University

Jia Huang

Xiamen University of Technology

Qinzheng Yang

Qilu University of Technology

Xiangfan Nie

Air Force Engineering University

Wenjun Wang

Liaocheng University

Cooperative Institutions

Nanchang Hangkong University

Chinese Academy of Sciences

Beihang University

Aero Engine Corporation of China (China)

Northwestern Polytechnical University

Shanghai Jiao Tong University

Central South University

Tsinghua University

Harbin Institute of Technology

Chinese Academy of Agricultural Mechanization Sciences

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The Teaching of Piano Improvisation in Normal Universities

Huang Jia

The course of piano improvisation is one of the compulsory courses for students of normal universities.Based on the discussion of its preparation work,and the content and methods of piano improvisation teaching,the paper elaborates its significance and characteristics and the suggestions of improve students' ability piano improvisation.

Improvisation

Piano pedagogy

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Theoretical basis and fundamental system of Qigong

Shanghai Journal of Traditional Chinese Medicine (2014)

Huang Jia

Theoretical study on Qigong is one of the establishments of the necessary basic conditions for learning. By literature collection,we believed that the theoretical basis of Qigong includes traditional philosophy,theory of traditional Chinese medicine,and principle of health maintenance. Confucianism,Buddhism and Taoism,and health-related arms are referred to in the theory and practice. The basic framework Qigong includes four aspects: correspondence between man and universe,holism,health conservation and martial art system.

Holism

Taoism

Martial Arts

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On the Important Role of Music Education in Improving the Overall Quality of College Students

Journal of Chongqing Institute of Technology (2005)

Huang Jia

With the continuous deepening of the humanism and quality-oriented education of college students in our country, music education has become an important way to conduct education to college students. This paper discusses the important role of music education in quality education of college students from “training morality”, “developing intelligence”, “refining sentiment”, and “protecting health”.

College education

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Analysis of the reasons for board type heat exchanger jam and its counter move

Industrial Water Treatment (2000)

Huang Jia

In order to solve the problem that board type heat exchanger couldn't run continuously for a long time due to getting jammed easily. The reasons of it are analyzed and adjusted in respect of the component of chemicals, the ways of feeding and the running techniques. In the past the board type heat exchanger could only run 144 hours continuously. Now it can run 1 430 hours continuously. It is confirmed that the chemicals of Plant B is fit for this circulating water system.

On board

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Effects of Tip Clearance Height on Hot-Streak Migration in High Subsonic Micro Turbine

SSRN Electronic Journal (2022)

Jingde Zhu Xin Xiang Huang Jia Xia Chen

An intimate understanding of the temperature distribution of turbine components is required for advanced and efficient cooling systems and blade designs. Studies indicate that severe inlet-temperature distortion (hot streaks) redistributes the temperature in the turbines. Regarding the micro turbine, the stronger tip-leakage flow caused by the dimensional effect has a greater impact on the flow structure in the rotor, which can modify the hot-streak migration and its influence on the turbine. In this study, a numerical simulation is performed on a 1-stage high subsonic micro axial turbine to investigate the effect of tip-clearance height on hot-streak migration. The results show that, in the micro rotor, the relative radial hot-streak migration (towards the blade tip) caused by tip leakage is greater owing to the intensified leakage flow, and there exists a linear relationship between this migration and the clearance height within limits. For hot-streak migration on the suction surface, an apparent uplift (approximately 9.2% of the blade height) near the trailing edge caused by the large clearance is discovered. Furthermore, the hot fluid from the pressure side enters a large clearance at a shorter axial distance, whose thermal impact on the tip is reduced (approximately 2.2%) by the thickened separation bubble.

Streak

Tip clearance

10.2139/ssrn.4213138

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Numerical Analysis on Combustion Flow Characteristics of Jet-Stabilized Combustor with Different Geometry

SSRN Electronic Journal (2021)

Le Tian Haijun Sun Yihua Xu Ping Jiang Hongyi Lu

In this study, three novel jet-stabilized combustor geometries with cavity, vertical ring and vertical pipe respectively are proposed, the combustion flow and emission characteristics are numerically investigated and compared with the original jet-stabilized combustor. The realizable k-ε model and presumed PDF model are used for simulating the turbulent combustion, and the NO formation model is used for NO emission. The results show that two vortex pairs formed in primary zone under four combustors, but for the combustor with vertical ring, a vortex pair also appears downstream of air jet holes. For the combustor with vertical pipe geometry, the vortex pair in right side is the biggest, meanwhile the extrusion effect on the left vortexes is obvious. The high-temperature zone is mainly located in the primary zone and downstream of air jet holes for all cases, while the combustor with vertical ring have the smallest high temperature region, and it with a uniform temperature distribution. The outlet temperature distribution factor is lower than 0.036 for all combustors. Compared with the original combustor, the NO emission of combustors with cavity and vertical ring decrease respectively by 31% and 52%, while the NO emission of combustor with vertical pipe increases by 32%.

10.2139/ssrn.3967942

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Thermomechanical fatigue and life prediction method of a precision cast superalloy with electrical discharge machining drilled holes

International Journal of Fatigue (2022)

Xing Song Yun Jiang Huang Jia Xiangfan Nie

10.1016/j.ijfatigue.2022.107253

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Strain-controlled low cycle fatigue behavior of a superalloy applied in combustion liner considering the effect of temperature and stress concentration

Authorea (Authorea) (2024)

Lingying Luo Wenjun Wang Qinzheng Yang Dong Mi Xu Wang

This study aims to investigate the low cycle fatigue (LCF) behavior and fatigue life prediction method of an advanced solid solution strengthened nickel-based superalloy at various temperatures and stress concentrations. Cylindrical specimens as well as plates with three types of holes (including straight holes and inclined holes with different orientations) were designed and machined for fatigue tests. The test results revealed fatigue life decreases with the temperature increasing. Meanwhile, the fatigue lives of the plate specimens have decreased differently and are strongly dependent on the geometry and orientation of the holes. The key damage parameter related to the fatigue life was found on the strain gradient path. A criterion based on strain gradient is defined as the boundary of the damage process zone. The results show that the prediction was in good agreement with the experimental data, for the majority of the data is within a scatter band of ±2.

Low-cycle fatigue

Strain (injury)

10.22541/au.171730301.13066288/v1

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High throughput screening for pharmaceutical activity compounds

Zhongguo yaolixue tongbao (1999)

Huang Jia

High throughput system is a novel multi disciplined drug discovery system backed by modern molecular biology, advanced detection technology. Combined with the work in the National Center for Pharmaceutical Screening, the composition of high throughput screening system and the related technique are introduced. The four parts of the system and their roles in drug discovery are discussed in detail. High throughput system can accelerate drug discovery in our country.

High-Throughput Screening

Screening techniques

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Properties and Life Prediction of Low Cycle Fatigue Behavior on Notched DS Ni-based Superalloy

Acta Aeronautica et Astronautica Sinica (2013)

Huang Jia

Experimental investigation is carried out in this paper on the low cycle fatigue(LCF) behavior of directionally solidified(DS) Ni-based superalloy DZ125 at 850 ℃ with differential notch geometries and theoretical stress concentration factors(Kt).The stress-strain field at notch roots is obtained based on the elastic-plastic finite element analysis.Life prediction of notched specimens is then performed by the introduction of conventional and Kt-modified theory of critical distance(TCD) to SWT parameters.The results show that,the resistance of LCF has little to do with the geometrical shape of notch specimens but is heavily Kt-dependent.No matter by taking sharp specimens as calibration samples or dealing with critical distances by the statistical averaging method,both point method(PM) and line method(LM) of the conventional TCD exhibit that the life prediction ability related to the stress concentration factor is larger than the five times scatter band.However,a highly improved scatter band within two times can be obtained by both point and line methods of Kt-modified TCD,and the two methods are notch-geometry independent.The SWT parameter may be used to consider the effect of mean stress(stress ratio).Therefore,accurate life prediction,based on the test data of LCF of smooth specimens and just one kind of notched specimens,can be carried out using this modified TCD for other notched specimens at different stress ratios,and its application will be simple and convenient.

Line (geometry)

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