Specific Projects:

Industrial and Defence Project:

• FEM & CFD Analyses of Combustor and Plenum Chamber for 40 kg/s Gas Dynamic Laser System (Project No. LASTEC-SP-1(253)-04/IAT): CFD analyses using ANSYS FLUENT have been carried for Combustor of 40 kg/s Gas Dynamic Laser System for calculation of heat transfer coefficients and heat transfer rates. The results of unsteady fluid flow and transient dynamic structural analyses have helped LASTEC to build GDL systems for continuous firing for prescribed duration. (Status: Completed)

• Conjugate heat Transfer Analysis of High-Pressure Compressor Disc Cavities of Marine Gas Turbine: CFD analysis using FLUENT software has been carried out to obtain temperature distribution and local heat transfer coefficients at different locations in disc cavities. (Status: Completed)

• CFD Analysis of Stator-Rotor Interaction in the Low Pressure Turbine Stage of an Axial Flow Gas Turbine: Studies have been conducted for three dimensional steady-state stage calculation using mixing plane model and two-dimensional unsteady flow analysis using sliding mesh model. (Status: Completed)

• IR Signature Suppression of Ship Engine Exhaust Plume using Water Mist: With aim to bring down temperature of naval ship engine exhaust from 600K to 370K to suppress IR signature. Water mist was used to cool the exhaust plume coming out from the ship engine. The steady and unsteady state simulations with ANSYS FLUENT were carried out for combustion gases to find the penetration of mist to the core of exhaust plume and also to optimize the droplet characteristics. (Status: Completed)

• Design, Development and Testing of Blast Door - Blast door upto 7 Bar incident pressure capacity with the aim to indigenize this technology and to have import substitute at much lower costs. The Design work was carried out in collaboration with IIT Bombay.  Contributed in conceptual design, fabrication, installation and conduct of explosions trials of door with TNT explosive. (Status: Completed)

• Design Validation of Safe Storage of HD 1.1 Explosives Upto 2 T NEC Based on Unit Risk Principle (URP) – To validate the new design of HD 1.1 explosive storage structure with actual field trials in order to reduce the safe separation distances between URP storage structure and adjacent storage structures. Contributed as a team member in instrumentation and conduct of explosion field experiment using TNT explosive. (Status: Completed)

• Design, Development and Establishment of Shock Tube Facility - Lab level experimental test facility for evaluating samples of composite slab/ building material subjected to simulated blast loads at much lower costs compared to field blast experiments. The design work was carried out in collaboration with IIT Madras. Contributed in conceptual design, preliminary design calculations, CFD analysis using ANSYS FLUENT, design of sample holding mechanism, design of test chamber and diaphragm rupturing mechanism and making the facility operational at CFEES.

• Modular & Portable Ramp for A-class Vehicles - A modular, man portable, manually installable, easily transportable ramp which will increase the efficiency of armed forces by cutting down their logistics timings was developed at CFEES and undergone user trials under the supervision of Army at Hissar Cantt.  Contributed in conceptual design, design calculations, technical discussions with user (Army), collection and implementation of user inputs. Conduct of user trials with Tank T-90, ICV-BMP, ARV etc as per trial directives of Indian Army. Product handed over to Indian Army in Aug 2019. (Status: Completed).

• Design and Development of working model for Combat Search and Rescue (CSAR) Helicopter Motion Simulator – To demonstrate working principle of a reliable, safe and cost effective helicopter motion simulator for training of commandos to perform special operations such as fast roping/slithering during a CSAR action of army. Contributed in technical discussions with Army, collection and implementation of user inputs, conceptual design and design calculations, technical demonstration to users. (Status: Completed).

• Conduct of  design validation trial for 1/10th &  1/5th scaled down models under the Project - Establishment of Scaling laws for Explosion in Tunnel (Project No: ST/15-16/CFE-1321). Design Validation field trial of 1/5th scaled down model of 40 MT U/G Explosive Storage Building with vertical shaft. Contributed in Pre trial (explosion using TNT) preparation, Range Safety during trial, deployment of field sensors (pencil probes, geophones and blastmates) (Status: Completed).

• Conduct of  design validation trial for 1/10th &  1/5th scaled down models under the Project - Establishment of Scaling laws for Explosion in Tunnel (Project No: ST/15-16/CFE-1321). Design Validation field trial of 1/5th scaled down model of 40 MT U/G Explosive Storage Building with vertical shaft. Contributed in Pre trial (explosion using TNT) preparation, Range Safety during trial, deployment of field sensors (pencil probes, geophones and blastmates) (Status: Completed).

• Explosive Safety Management and Protective Structures (TD/16-17/CFE-1328): Design, development and validation of section of semi burried hardened aircraft shelter capable to withstand direct hit of 2000 lb bomb with a penetration capability of 1.8 m in hard rock and 75 psi incident overpressure and 40g ground shock effects – Contributed for modeling and simulation studies of the burster slab of HAS against 2000lbs bomb and coordinated the project activities as deputy project leader. (Status: Ongoing).

• Design and development of Medical Bed Isolation System (Aashray): To combat Covid-19 by stopping/ minimizing the spread of virus/ infection released by the patient has been successfully designed, developed and product got demonstrated within a period of 02 months. This is a low cost, reusable solution to maintain proper isolation of Covid-19 patients by creating suction /negative pressure near exhale, and further filtering and disinfecting the aerosol. ToT with two firms done. (Status: Completed).

• Design and development of Low Cost Mechanical Ventilator: One low cost, mechanical ventilator having Controlled IPPV technique, Volume and Pressure based breathing, 0.3 to 5.0 seconds inspiratory time is designed and developed at DIAT. The Inspiration- Exhalation (I:E) Ratio lies between 1:1 to 1:5 with adjustable Breath Rate of 10-24 BPM. This is a Light Weight, easily operable system with tidal volume ranging between 100 ml to 2000 ml ATPD. (Status: Completed)
   

Academic Projects:

• An Experimental Study of High Performance Marine Heat Exchanger for Lube Oil Applications Contribution heat transfer performance:  Carried out experimental investigation of augmented marine lubricating oil cooler. The results showed improvements on equal mass flow rate and on equal pressure drop basis

• Experimental Analysis of Heat Transfer by Jet Impingement on Dimpled Surface Contribution: Carried out experimental investigation of heat transfer by jet impingement on dimpled heated surface. The effect of H/D (jet height to jet diameter), D/d (Jet diameter to dimple diameter) on heat transfer for various Reynolds numbers were investigated. The results showed improvements in heat transfer and the design parameters for jet impingement cooling were obtained.

• Heat Transfer in an Axisymmetric Air – Jet Impinging on Heated Pedestal Contribution: Carried out experimental and CFD Analysis of heat transfer by jet impingement cooling on heated pedestal. The effect of H/d (jet height to jet diameter), D/d (Pedestal diameter to jet diameter) on heat transfer for various Reynolds numbers were investigated. The results showed improvements in heat transfer and the design parameters for jet impingement cooling were obtained

• CFD Analysis and Experimental Validation of Thermal performance of Heat Sink:  Contribution: Carried out the experimentation and CFD analysis and obtained various performance parameters. The results obtained with CFD found well in agreement with the experimental results as well as with analytical results.

• Experimental Investigation of Fluid Flow & Heat Transfer of a Grooved Heated Pedestal: Experimental analysis has been carried out on heated pedestal to know enhancement in heat transfer coefficient because of grooving. Heat transfer by impinging jet for a range of Reynolds numbers and jet to pedestal distances has been investigated

• Effect of Tip Clearance on Performance of Heat Sink: Experimental Investigation is done to evaluate effect of tip clearance on heat transfer coefficient. Results have been obtained for circular and square fins array for a range of Reynolds numbers and tip clearances

• Performance Evaluation of a Plate Heat Exchanger and an Augmented Shell &   Tube Heat Exchanger:  An experimental investigation has been conducted to study the heat transfer performance of Plate Heat Exchanger and augmented S&T Heat Exchanger for marine lubricating oil cooler. The augmented S&T Heat Exchanger had twisted tape inserts in tubes.

• Cylindrical Multi Order Multi Port System (CMOMPS) for Humanoid Gripper:  A Noval concept for reducing degree of freedom as input side without compromising much performance of the system at output in collaboration with R&D(E) DRDO. It can be used for handling complex pneumatic or hydraulic system, by which the actuators are actuated in different combination from one input only. The concept may be suitable for handling complex pneumatic or hydraulic systems and can also be used in humanoid gripper.  Humanoid gripper is among most difficult mechanical component in any humanoid

• Cylindrical Multi Order Multi Port System (CMOMPS) for Humanoid Gripper:  A Noval concept for reducing degree of freedom as input side without compromising much performance of the system at output in collaboration with R&D(E) DRDO. It can be used for handling complex pneumatic or hydraulic system, by which the actuators are actuated in different combination from one input only. The concept may be suitable for handling complex pneumatic or hydraulic systems and can also be used in humanoid gripper.  Humanoid gripper is among most difficult mechanical component in any humanoid.

• Validation of Flow Coefficient of Globe Control Valve using CFD:  An industrial problem statement for numerical analysis of angular pressure reducing and de-superheating globe control valve using CFD code ANSYS-FLUENT to check the correctness of experimental results is provided by MS IndiTech Valve Pvt. Ltd. Grid convergence studies and assessments of the ability of the k-epsilon and k-omega model to predict the coefficient of discharge is performed. Comparison between numerical and experimental results enabled us to establish set steps to perform CFD simulation to predict the performance parameters and control of noise created during actual real-time working of such valves