A5101657565- Fire dynamics and safety research
- Combustion and Detonation Processes
- Cavitation Phenomena in Pumps
- Hydraulic and Pneumatic Systems
- Risk and Safety Analysis
- Geoscience and Mining Technology
- Coal Properties and Utilization
- Microbial Metabolic Engineering and Bioproduction
- Advanced DC-DC Converters
- Geomechanics and Mining Engineering
- Electrochemical sensors and biosensors
- Particle Dynamics in Fluid Flows
- Induction Heating and Inverter Technology
- Multilevel Inverters and Converters
- Biofuel production and bioconversion
- Enzyme Catalysis and Immobilization
- Molecular Sensors and Ion Detection
- Silicone and Siloxane Chemistry
- Heat Transfer and Boiling Studies
- Epoxy Resin Curing Processes
- Cyclone Separators and Fluid Dynamics
- Embedded Systems and FPGA Design
- Fluid Dynamics and Turbulent Flows
- Lipid metabolism and biosynthesis
- Islanding Detection in Power Systems
Northwestern Polytechnical University
2002-2025
Henan Polytechnic University
2004-2025
State Administration of Work Safety
2025
Nanjing Normal University
2022-2025
China University of Petroleum, East China
2023-2024
University of Arizona
2024
Shaanxi University of Science and Technology
2024
Hebei University of Technology
2023
State Key Laboratory of Inorganic Synthesis and Preparative Chemistry
2022
Jilin University
2022
Pulse detonation engines (PDEs) have become a transformative technology in the field of aerospace propulsion due to high thermal efficiency combustion. However, initiating waves within limited space and time is key their engineering application. Direct initiation, though theoretically feasible, requires very critical energy, making it almost impossible achieve applications. Therefore, indirect initiation methods are more practical for triggering that produce deflagration wave through...
Schizochytrium sp. has received increasing attention as promising commercial resource for the sustainable production of lipids, due to their fast growth rate and high lipid content. However, price glucose represents a significant proportion total substrate cost. Therefore, in this study, lignocellulosic hydrolysate corn stover (CSH) was used low-cost culture medium replace fermentation. When HX-308 fermented with 20% from CSH 80% pure glucose, reached 21.2 g L-1 , which is lower than that...
ABSTRACT Squalene (C 30 H 50 ) is an acyclic triterpenoid compound renowned for its myriad physiological functions, such as anticancer and antioxidative properties, rendering it invaluable in both the food pharmaceutical sectors. Due to natural resource constraints, microbial fermentation has emerged a prominent trend. Schizochytrium sp., known harbor intact mevalonate acid (MVA) pathway, possesses inherent capability biosynthesize squalene. However, there dearth of reported key genes MVA...
Docosapentaenoic acid (DPA) is widely applied in medicine and health products because of its important physiological functions. Using microbial cell factories for DPA production considered a viable alternative to extracting from seal oil. In this study, an engineering strategy the efficient was developed. First, biosynthesis pathway successfully established Yarrowia lipolytica. Then, increase acetyl-CoA by citrate metabolism malonyl-CoA introducing new orthogonal synthesis further enhance...
The conventional control strategy for active power filters (APF) is essentially a nested structure, where the output of outer voltage loop will affect command current inner loop, inevitably impairing performance in harmonic compensation. In this paper, to enhance harmonic-compensation performance, dc-link has been modified and added as disturbance which forms paralleled structure. Thus pure can be achieved not affected by loop. Parameters proposed are designed considering both stability...
In order to save energy by broadening its application range, the influence of impeller trim on performance a two-stage self-priming centrifugal pump was numerically studied. The hydraulic experiments and were carried out. And unsteady pressure fluctuation radial force in analyzed. results show that with increase quantity, best efficiency point would move small flow rate condition. Under design rate, when both two stages trimmed 6%, head reduced 13%, as well decreased 1.69 percentage points,...
In order to measure the pressure pulsation, vibration, and noise characteristics of multistage centrifugal pump in different flow rates, a five‐stage was chosen as research object. The results show that main frequency pulsation BPF 1 , 9APF, 2 9APF. According monitoring points, intensity fluctuation increased then decreased, with strongest at point P2. peak value P2 obviously higher than other points. characteristic vibration is 4APF, 2BPF 3BPF 4BPF . number frequencies outlet flange...
To achieve efficient detonation initiation within a short distance and time, an innovative ignition approach based on hot jet shock wave focusing reverse boosted chamber configuration is proposed. Two-dimensional numerical simulations are employed to comprehensively investigate the mechanisms of in H2–air mixtures. The intricate evolutionary processes involving flame acceleration, deflagration transition, propagation meticulously analyzed. investigation reveals that this can be categorized...
In order to study the unsteady performance of a two-stage self-priming centrifugal pump, numerical calculation in pump was performed and energy characteristics experiments were carried out. The pressure pulsation radial force then analyzed. results show that values are close experiment values. Head deviation is less than 3 %, efficiency 2 percentage points. Compared with monitoring point <mml:math...
Based on the discrete phase model (DPM) solid–liquid two-phase flow and MATLAB image processing technology, an integrated prefabricated pumping station was taken as research object to study deposition characteristics under different rates, particle diameters, liquid levels. Considering incomplete symmetry of internal station, single/double pumps were also analyzed. Double symmetrically distributed in pump movement trajectories particles at bottom pit closing inlet valve measured through use...
To examine the effect of cavitation on vibration a multi-stage pump, five-stage diffuser centrifugal pump was selected to test characteristics under non-cavitation and conditions. Vibrations were monitored at six points (V1–V6). Results show that when occurs, characteristic frequencies measuring obviously increase, for 1.0Qd (the design flow rate). The gap in velocity amplitude between higher axial frequency harmonics main becomes smaller, cavitation-induced excitation is very obvious all...
Due to the strong unsteadiness of pulse detonation, large flow losses are generated when detonation wave interacts with turbine blades, resulting in low efficiency. Considering that dissipated into gas as heat energy, some them can be recycled during expansion process subsequent stages by reheat effect, which should helpful improve detonation-driven Taking this account, paper developed a numerical model chamber coupled two-stage axial turbine, and stoichiometric hydrogen-air mixture was...
Thermosetting phenolic resins are widely used in the field of matrix resin high-tech materials due to their excellent ablation performance, structural integrity and thermal stability. Traditionally, synthesis almost all thermosetting often requires alkali catalyst. These catalysts difficult be completely removed from resin, residue will adversely affect performances these a certain extent. Herein, we described strategy for boron-modified under alkali-free conditions. The key success this...
Based on the discrete phase model (DPM), solid–liquid two-phase flow calculation, particle settling theory and MATLAB image processing technology, influence of installation position submersible pumps deposition characteristics in a cylinder-type prefabricated pumping station was studied, two performance indices, rate area ratio easy region were proposed. The results show that increase as suspension height increases. discharge effect is best when 0.1H0, however, at this time inlet bias pump...