Trong thời gian GS Bruce Vu làm việc tại BM Vật lý – Ngành Kỹ thuật Không gian theo Chương trình Fullbright, thầy rất hào hứng được hướng dẫn các bạn SV có quan tâm về thực nghiệm và nghiên cứu khoa học. Vì vậy, thầy đã gửi đến ngành danh sách các đề tài mà thầy sẽ đồng hành với các bạn SV yêu thích khoa học. Từ bây giờ, các bạn SV quan tâm hãy chọn lựa và đăng ký nhé. Thầy sẽ vẫn tiếp tục làm việc với các bạn ngay cả khi đã kết thúc chương trình Fullbright ở Việt Nam nhé!!!
Chi tiết như sau:
————————————————————————–
Thermodynamics:
1. Efficiency Comparison of Heat Engines: Build simple models (like a Stirling engine or a Carnot engine) and compare their efficiencies under different operating conditions.
2. Heat Transfer Investigation: Measure heat transfer rates through different materials and analyze how factors like material thickness and temperature difference affect the rate of heat transfer.
3. Solar Oven Design: Design and build a solar oven to cook food using principles of solar heat transfer and insulation.
Fluid Mechanics:
1. Flow Visualization: Construct a small wind tunnel or water flow channel to visualize fluid flow patterns around various shapes (e.g., airfoils, cylinders) using smoke or dye injection techniques.
2. Drag Coefficient Measurement: Experimentally determine the drag coefficients of different objects (e.g., spheres, cylinders) using a simple force balance and fluid flow measurements.
3. Pump Performance Testing: Evaluate the performance of different pumps (centrifugal, reciprocating) by measuring flow rates and pressure heads under varying operating conditions.
Aerodynamics:
1. Airfoil Design and Testing: Design and 3D print different airfoil shapes, then test and compare their lift and drag characteristics in a wind tunnel.
2. Quadcopter Stability Analysis: Investigate the stability and control of a small quadcopter by analyzing its aerodynamic forces and moments during flight.
3. Propeller Efficiency Study: Build small-scale propellers and investigate how blade geometry and pitch affect efficiency and thrust production.
Combustion:
1. Candle Flame Characteristics: Investigate the characteristics of a candle flame under different conditions:
⦁ Measure the height and color of the flame with varying air supply (e.g., using a fan or covering the flame).
⦁ Compare the flame behavior in different environments (e.g., indoors vs. outdoors, in still air vs. with airflow).
2. Alcohol Burner Efficiency: Compare the efficiency of burning different types of alcohol (e.g., ethanol, methanol) in a simple alcohol burner:
⦁ Measure the heat output using a calorimeter or by heating a known mass of water.
⦁ Analyze the flame color, height, and duration for each type of alcohol.
3. Flame Temperature Measurement: Use a thermocouple or infrared thermometer to measure the temperature of flames produced by different fuels (e.g., natural gas, propane):
⦁ Compare the flame temperatures at different distances from the burner nozzle.
⦁ Investigate how adjusting the air-to-fuel ratio affects flame temperature.
4. Fire Triangle Exploration: Demonstrate the components of the fire triangle (fuel, heat, oxygen) and their role in combustion:
⦁ Experiment with extinguishing methods (e.g., covering with a lid, smothering with CO2 from dry ice) to observe their effectiveness in stopping combustion.
5. Flame Speed Measurement: Measure the speed of flame propagation in a controlled environment:
⦁ Use a thin layer of combustible material (e.g., alcohol-soaked cotton thread) and ignite one end to observe how quickly the flame travels along the material.
⦁ Vary parameters such as material thickness or composition to investigate their effects on flame speed.
Detonation:
1. Detonation Speed Measurement: Investigate the speed of detonation in different materials or mixtures:
⦁ Set up a controlled environment (like a long tube or channel) and initiate detonations using small explosive charges or mixtures.
⦁ Measure the shock wave propagation speed using high-speed cameras or pressure sensors.
2. Shock Tube Construction: Build a simple shock tube to study shock wave formation and characteristics:
⦁ Use PVC pipes or other suitable materials to construct a straight tube with a diaphragm at one end.
⦁ Initiate detonation using a small explosive charge or compressed gas to rupture the diaphragm, generating a shock wave that can be measured and analyzed.
3. Detonation Energy Comparison: Compare the explosive energy released by different materials or explosives:
⦁ Construct small-scale explosive devices (like firecrackers or model rockets) using various explosive compounds or mixtures.
⦁ Measure the blast radius or force exerted by each explosive using pressure gauges or by observing the effect on surrounding materials.
4. Detonation Wave Reflection: Study the reflection and interaction of detonation waves:
⦁ Construct a setup with angled surfaces or obstacles to observe how detonation waves reflect and interact with each other.
⦁ Measure changes in wave intensity and direction using pressure sensors or high-speed photography.
5. Detonation Chamber Design: Design and build a small-scale detonation chamber for controlled experiments:
⦁ Use transparent materials (like acrylic) to construct a chamber where detonation processes can be visually observed.
⦁ Initiate detonations using controlled explosive charges or mixtures to study shock wave propagation and energy release.
6. Safety and Containment Protocols: Develop safety protocols and containment measures for handling small-scale detonations:
⦁ Research and implement safety guidelines for handling explosive materials and conducting detonation experiments.
⦁ Design and test containment systems (such as blast shields or protective barriers) to ensure safety during experiments.
These projects require careful planning, adherence to safety guidelines, and often involve basic principles of physics, chemistry, and engineering. They provide valuable insights into the dynamics and effects of detonation, making them suitable for students interested in explosive phenomena and their applications.
Rocket Acoustics:
Exploring rocket acoustics involves studying the sound generated by rocket engines during launch and understanding its propagation and effects. Here are some small project ideas related to rocket acoustics:
1. Sound Measurement at Launch Site:
⦁ Design and build a simple microphone array or use individual microphones to measure the sound levels produced by rocket launches.
⦁ Analyze the frequency spectrum and intensity of the sound waves recorded at different distances from the launch pad.
⦁ Compare the acoustic signatures of rockets using different types of propulsion systems (solid fuel, liquid fuel, hybrid).
2. Noise Reduction Techniques:
⦁ Investigate methods to mitigate or reduce the acoustic noise generated by rocket engines.
⦁ Design and test acoustic dampening materials or structures to reduce sound propagation during rocket engine firings.
⦁ Measure the effectiveness of different noise reduction techniques using sound pressure level measurements.
3. Acoustic Simulation and Modeling:
⦁ Use computational tools (such as MATLAB, Python, or specialized software) to simulate the acoustic field generated by a rocket engine.
⦁ Model the propagation of sound waves through different atmospheric conditions and terrain types.
⦁ Compare simulated results with experimental measurements to validate the accuracy of the model.
4. Rocket Engine Design Impact on Acoustics:
⦁ Design and build small-scale rocket engines (using water, compressed air, or commercially available model rocket engines).
⦁ Measure and analyze the acoustic characteristics of each engine design during operation.
⦁ Investigate how changes in nozzle geometry, fuel type, or combustion chamber dimensions affect the generated sound levels and frequencies.
5. Acoustic Environment Analysis:
⦁ Study the environmental impact of rocket launch noise on nearby habitats or wildlife.
⦁ Conduct field studies to measure the acoustic impact of rocket launches on local communities or natural ecosystems.
⦁ Evaluate regulatory guidelines and noise exposure limits related to rocket launch activities.
6. Educational Outreach and Awareness:
⦁ Develop educational materials or presentations to explain rocket acoustics and its significance to students or the general public.
⦁ Organize outreach events or demonstrations to showcase the principles of rocket acoustics and its role in aerospace engineering.
————————————————————————–
Các bạn SV có quan tâm, vui lòng gửi mail về cô Thủy: ttthuy@hcmiu.edu.vn để trao đổi chi tiết nha!!!!
Deadline: 31/07/2024